Explanation of #19: #19 is an integral of dx/sqrt[(9+x)(9-x)] with respect to x. Start by distributing the expression inside the square root to get dx/sqrt(9^2 - x^2). Change x^2 to an equivalent form 9^2*(x/9)^2 and factor out a 9^2 to get dx/sqrt(9^2*(1 - (x/9)^2)). The factored 9^2 can be reduced to 9 and brought outside the square root, giving us dx/9sqrt(1-(x/9)^2). Time to do U-Substitution. Set x/9 = u, and take the derivative of both sides to get dx/9 = du. Substitute x/9 for u and dx/9 for du back into the equation to get du/sqrt(1-u^2). The expression 1/sqrt(1-x^2) is in fact the derivative of arcsinx, and we can take the antiderivative with our variable u to get to arcsinu. Finally, reverse our x/9 = u substitution to get arcsin(x/9) and add our constant, so the integral of dx/sqrt[(9+x)(9-x)] = arcsin(x/9) + C. Kudos to the creator for giving a clever and thematic integral that is still fairly accessible!
Phira did not exist when i wrote this chart. You may download it manually and reorganize the files before you import it locally into phira. Link: files.phi.zone/charts/%E2%91%A8.zip
@@1st_NewBie open the downloaded file, rename the .pez to .zip, and copy all the files from both zips (72584389.zip and Texture.zip) into a new single zip file (whatever the name is), and then rename the .zip to .pez
@@unrobotmuyinusual1629 Also galaxxy brain in noisz starlivht, and the questions and the position of the correction answer in that one is randomized so you can't just memorize Basically everywhere Taro had ever been
I saw (e^4)'=4e^3 and went "wait, this doesn't add up", then saw the ✔️ and ❌️ at the bottom, only to do the biggest gasp of my life. Loved the gimmick, brilliant.
Can we get an explanation for the more complicated questions perhaps? I could’ve sworn that (4e)’ = 4e^3 is true but it allowed you to press it as false.
@@RealSoleriusThat's because 12th grade math isn't sufficient to know everything. You need to know calculus and set theory, and even then I don't understand one of the questions.
funny chart also wait what, why doesn't lim(h -> 0, (f(a-h) - f(a))/h) > 0 f'(a) > 0 isn't it literally the same thing edit: HAH it's f(a PLUS h), oh my god, I'm a total ⑨ 😭
@@naptie there isnt such thing as an anti touch mechanism in phigros, maybe you can do bombs like in stepmania but then it would sum up in memorising which parts are true or not so its a pretty bad part
@@conicthehedgehog9166 In fact there is a way to achieve this using phigros (fanmade) mechanisms, which involve fake notes. For each question (in this case a false one), there are two real notes (R1, R2) and two fake notes (F1, F2), placed like this: R2 F2 F1 R1 ✓ × After F1 and R1 hit the judge line, R2 and F2 exchange their position: F2 R2 ✓ × This results in two hits on the right side. If you hit both sides simultaneously, because fake notes can't be judged, you are hitting R1 and R2 at the same time, which gives R2 a Good or even a Bad judgment.
PhiPlayer supports the majority of features used in the chart and can almost successfully run it. To get the chart, go to files.phi.zone/charts/%E2%91%A8.zip. And to get it recognized by PhiPlayer, extract files in the .pez (zip, in fact) and the textures, and put them in a chart folder which you will need to create manually under the chart path specified in PhiPlayer settings.
PhiPlayer supports the majority of features used in the chart and can almost successfully run it. To get the chart, go to files.phi.zone/charts/%E2%91%A8.zip. And to get it recognized by PhiPlayer, extract files in the .pez (zip, in fact) and the textures, and put them in a chart folder which you will need to create manually under the chart path specified in PhiPlayer settings.
did the phieditor update? Or was it just the emulator? I wish I could play this chart (since now I know how to play it) if you have a discord server you could share this chart.
This chart is made with Re: PhiEdit, containing features that neither PhiEditor nor the emulator supports. In spite of that, PhiPlayer supports the majority of features used and can almost successfully run the chart. To get the chart, go to files.phi.zone/charts/%E2%91%A8.zip. And to get it recognized by PhiPlayer, extract files in the .pez (zip, in fact) and the textures, and put them in a chart folder which you will need to create manually under the chart path specified in PhiPlayer settings.
![[Phigros Fanmade Collab/Shader]CHAOS IN Lv.15「The silent CHAOS will gaze upon you」](http://i.ytimg.com/vi/cED782YfsEQ/mqdefault.jpg)
![[Phigros Fanmade Collab/Shader]CHAOS IN Lv.15「The silent CHAOS will gaze upon you」](/img/tr.png)
え、これ神譜面やん()
後ろの数式のバカの基準めっちゃ上がってくの草
14というよりも13だと思った
The chart give the player the time to learn the mechanic lol, i love it
譜面で問題を解かせるという新しい譜面
(結局譜面)
さすが大学⑨年生、ある程度の"すうがく"は解けること前提なんだな！
てか文字もしやガイド線を曲げて作ってる…？強い…強くないか？
SPはLv.14ですか？私は数学が苦手だと思います
"You need math in your life"
the teacher's right
むっず！www
数式自体はそこまでだけど一瞬で読み解くのめっちゃ大変www
発想最高すぎるw
Explanation of #19:
#19 is an integral of dx/sqrt[(9+x)(9-x)] with respect to x.
Start by distributing the expression inside the square root to get dx/sqrt(9^2 - x^2).
Change x^2 to an equivalent form 9^2*(x/9)^2 and factor out a 9^2 to get dx/sqrt(9^2*(1 - (x/9)^2)).
The factored 9^2 can be reduced to 9 and brought outside the square root, giving us dx/9sqrt(1-(x/9)^2).
Time to do U-Substitution. Set x/9 = u, and take the derivative of both sides to get dx/9 = du.
Substitute x/9 for u and dx/9 for du back into the equation to get du/sqrt(1-u^2).
The expression 1/sqrt(1-x^2) is in fact the derivative of arcsinx, and we can take the antiderivative with our variable u to get to arcsinu.
Finally, reverse our x/9 = u substitution to get arcsin(x/9) and add our constant, so the integral of dx/sqrt[(9+x)(9-x)] = arcsin(x/9) + C.
Kudos to the creator for giving a clever and thematic integral that is still fairly accessible!
I think we have different definitions of fairly accessible
Certified 🤓 moment
And I do not mean that in a bad way
I clicked on the video expecting some nice map, I got jumpscared by touhou
I absolutely love this.
The gimmicks, the effects… And as a Touhou fan, the song…
Thank you for this.
数式地帯同時押しで処理出来そう()
あと普通に譜面が良い
同時押なら good / bad 判定につながる
それを防ぐためのトリックが使われていました
暗記したら行ける()
@@naptie ちゃんと対策されてたんだ
@@octo-uro simultaneously hitting both sides should be counted as cheating, and should be prevented using a trick (I used fake notes for that)
This couldn't be more perfect. This is pure perfection
"oh wow this looks interesting"
chart starts asking advanced
math questions
めちゃくちゃいい難易度でやってみてぇ
can i get the chart's .zip?
files.phi.zone/charts/%E2%91%A8.zip
1:19 this guy had to go to kindergarten
ワイ、音ゲー動画と気づかず、全称記号に釣られる
∀
(∀R∈N) ないです
全ての実数は自然数に属さ
@@scp-682ver.Bright
∀x∈R∃x∉Nじゃね
全然違うね()
@@youkunn 𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔𐤔
これSPのlv14だw
マジでこんなんになる未来そんなに遠くなさそうなの怖いよねw
すごく共感
選択肢とかありそう
@@ガチルノン 譜面叩きながら選択肢えらぶのかw
めっちゃ楽しそう
Thank you for adding my favourite subject in
fun map! timings for calculations are actually playable too
What? I'm a math competitor and can't do some of the calculations in time.
I would absolutely love to play this chart it looks so fun
wow, it's amazing!
is it run on phira?
I really want to play it!
Phira did not exist when i wrote this chart. You may download it manually and reorganize the files before you import it locally into phira.
Link: files.phi.zone/charts/%E2%91%A8.zip
@@naptieoh okay thx
@@naptie thx :D
@@naptie
how to reorganize the files? :
@@1st_NewBie open the downloaded file, rename the .pez to .zip, and copy all the files from both zips (72584389.zip and Texture.zip) into a new single zip file (whatever the name is), and then rename the .zip to .pez
You outdid yourself this time. It's just perfect
Taro at it again with the math equation charts
問題とかなくても同時押しすればいいんじゃない？？
then you won't get an AP
ちなみにこれSP LV.14です
1＋2は√9にすれば正解なのに…
Wow I hadn’t thought so much. It’s such a simple way to correct the statement!
@@naptie Isn't it? I am a genius
算数じゃなくて数学なの草
what in the everloving hell, this is so cool but why must I do math while playing a rhythm game
*cuz it's cirno's math class*
i mean, Not in the groove and adofai neo cosmo already has their math in some levels
Everytime, amirite ?
@@unrobotmuyinusual1629 Also galaxxy brain in noisz starlivht, and the questions and the position of the correction answer in that one is randomized so you can't just memorize
Basically everywhere Taro had ever been
Yeah you know Taro's gonna be there when he made a fucking math chart
Perfect Play of Perfect Math Class.
Nice.
Happy Cirno Day btw
I saw (e^4)'=4e^3 and went "wait, this doesn't add up", then saw the ✔️ and ❌️ at the bottom, only to do the biggest gasp of my life.
Loved the gimmick, brilliant.
iPad AIR 2ではプレイできないのですか？
PhiPrayer はこの機種ではインストール出来ませんか？
@@murasame_yuu わかりません。iPad 9 では問題なく動作します。
待ってこれやりてぇ
え、こんな譜面降ってきたらキレそう（）
我終於可以有一個藉口來玩音遊
File?
the ultimate song that no one can fc first try (unless they pause)
but then the screen gets blurred
@@Wmann it doesnt on phi-sim :)
途中あってるのあるてw
このパックってどこでゲットしましたか?
この譜面だけダウンロードしても出来ないんですけど、、、
すまん…。譜面定数14.5〜15かも💦
すごく楽しそう
数学者専用譜面で草
これは新しいなw
楽しそうやからやってみたいわw
this would actually be a fun chart! i like this
are there link to dowload this chart so i can try please?
Learning an insane math while getting a phi
数字で鳥肌がたった
普通に楽しそう
Someone please tell me how to play phigros Fanmade
one plus one equal three, WOW, good job😂
How is this game even played, it’s so chaotic
Can we get an explanation for the more complicated questions perhaps? I could’ve sworn that (4e)’ = 4e^3 is true but it allowed you to press it as false.
e is the natural constant, and so the function f(x)=4e remains a constant value whose derivative is always zero
@@naptie Ah, that’s very clever! Thanks for the explanation!
當你玩音遊還要算數學
Tip: to complete this song you need to pass 12th grade
i passed 12th grade and i still don't know what the fuck are these equations
@@RealSoleriusThat's because 12th grade math isn't sufficient to know everything. You need to know calculus and set theory, and even then I don't understand one of the questions.
This is for best Math's student only lol
nice chart, and it so fun to play/watch
btw does tapping both wrong and correct answer is possible?
you will get a good / bad judgment for i used a trick to prevent such cheating
よく見たらLv14なの凝ってる
At least this one is more playable than april fool chart
你需要大学文凭才能打音游.jpg
高二表示最后两题不会
倒数第二个用高中知识可以解决呀
前面有一段讓我想到東方紅魔鄉
Gonna use this to revise for my maths test
its SP Lv.14
Edit: the level its gonna be 14.996
funny chart
also wait what, why doesn't lim(h -> 0, (f(a-h) - f(a))/h) > 0 f'(a) > 0
isn't it literally the same thing
edit: HAH it's f(a PLUS h), oh my god, I'm a total ⑨ 😭
Haha, you’re genius because you’re really doing some math!
I mean, if you just touch both sides at the same time it would be easier
you wont get AP by doing so
there's a trick i made to prevent this
@@naptie there isnt such thing as an anti touch mechanism in phigros, maybe you can do bombs like in stepmania but then it would sum up in memorising which parts are true or not so its a pretty bad part
@@conicthehedgehog9166 In fact there is a way to achieve this using phigros (fanmade) mechanisms, which involve fake notes.
For each question (in this case a false one), there are two real notes (R1, R2) and two fake notes (F1, F2), placed like this:
R2 F2
F1 R1
✓ ×
After F1 and R1 hit the judge line, R2 and F2 exchange their position:
F2 R2
✓ ×
This results in two hits on the right side.
If you hit both sides simultaneously, because fake notes can't be judged, you are hitting R1 and R2 at the same time, which gives R2 a Good or even a Bad judgment.
@@naptie ngl thats genius
ランダムで問題が切り替わるらしい
it's prewritten in the chart, there's no way to randomize the questions
Looks like a solid 14 for me,but god damn this chart looks like pure fun,good job 👍
最高に楽しいだろ…こんなの…
this looks harder than math..
wtf this looks so satisfying (except the math /j)
It's so great chart!
I like this!
Scary chart looks fun tho
It is only lv 14
途中のあの数式なんもわかんねぇ……
頑張ればこの譜面はAT
와 진짜 피그로스 좀 해본 사람이면 진짜 피그로스 느낌 잘 살렸다는거 느껴진다…대박
Can you download and play the map anywhere
すみません遊ぶ方法を教えてくれませんか？
野生の公式
How to play this chart?? 😫
9 years to 12 years
Can i give chart link?
files.phi.zone/charts/%E2%91%A8.zip
今もこの譜面で遊べる？
譜面で数学させるのキモすぎだろ!
しかも難易度がエグいのも混じってる。
数式を見るとっっ！うぅぅ頭がぁぁぁ！
The result is 9
You need a phd to play this level
tried doing the equation, this would be sp level 5 then?
nvm this would be 14 mb didn’t see some stuff
how do I play this?
PhiPlayer supports the majority of features used in the chart and can almost successfully run it. To get the chart, go to files.phi.zone/charts/%E2%91%A8.zip. And to get it recognized by PhiPlayer, extract files in the .pez (zip, in fact) and the textures, and put them in a chart folder which you will need to create manually under the chart path specified in PhiPlayer settings.
@@naptie thank you!
0:36 bruh the difficulty went 0 to 100 😭
That one was inspired by a right triangle with side lengths 3, 4, and 5
Epic
遊びたい！ !
PhiPlayer supports the majority of features used in the chart and can almost successfully run it. To get the chart, go to files.phi.zone/charts/%E2%91%A8.zip. And to get it recognized by PhiPlayer, extract files in the .pez (zip, in fact) and the textures, and put them in a chart folder which you will need to create manually under the chart path specified in PhiPlayer settings.
数式に目取られそうww
did the phieditor update? Or was it just the emulator? I wish I could play this chart (since now I know how to play it) if you have a discord server you could share this chart.
This chart is made with Re: PhiEdit, containing features that neither PhiEditor nor the emulator supports. In spite of that, PhiPlayer supports the majority of features used and can almost successfully run the chart. To get the chart, go to files.phi.zone/charts/%E2%91%A8.zip. And to get it recognized by PhiPlayer, extract files in the .pez (zip, in fact) and the textures, and put them in a chart folder which you will need to create manually under the chart path specified in PhiPlayer settings.
0:29 無解
just a random true statement
can you some how cheese the math question?