Unit circle padhana chaiye sabko Kaafi sari chije clear ho jati he trigonometry ka clear view hota he aur isse compound angles ka bhi derivation geometrically nikal sakte he Agar visualization achhi ho to koi bhi angle ka 1st quadrant me reflection konsi angle banayega yeh mind me nikal kar koi bhi 30 45 60 deg angle ke multiples wale angles nikal sakte he
Sir yahin se to mera sawal shuru hota hai ki , agar cos(-135) hua to cos(135) kaise likh sakte hain because ab ye 3rd quadrant mein lie karega to ab x co-ordinate -ve ho jaega and cos(-135) = - cos(135) hona chahiye. But fir hum ye kaise keh dete hain ki cos(-x)=cos x for all values . Because ye to sirf 4th quadrant ke liye hi sahi hoga .
You are great and down to earth mathematician, that actually overpass according to me, the so called known greatest mathematician. Knowledge lies in sharing the unknown aka doubtful.
Sir could you please make a video on chapter sequence of class 11th and 12th.i am facing trouble in my study.this is kindly requested plz plz plz plz....
Can We say the same thing using the graph of cosine fxn that it is symmetrical across the y axis , so it is an even fxn, so f(x) = f(-x) ? BTW ❤ from WEST BENGAL 😊😊😊
@@hritamkashyap tf will you do with that? Once you differentiate both sides to get dt in terms of dx there will be a term of sec^2x. What will you do with that? Unless you want to replace it in terms of t too and then proceed, which could worm.
@@uttamchaurasiya-zk5hk indeed, sir tells all the derivations and all the logics, it feels so good studying maths when everything has a logic and no steric hinderance, back bonding 🤣🤣
Itni fuddu si baat ke liye itna mahaul bana diya...cos(x) ye even function bhi h....aajkal RUclips wala teacher sab chhoti chhoti baat ke liye mahaul poora bana deta hai
Itna tabiyat se aap padhate hai, muh se jyada hath chalta hai lekin aisa lgta hai knowledge me khi kmi hai kyonki aap hamesha ulta sidha question copy kar ke late hai.
it can be proved easily as follow
cos(-x)=cos(0-x)=cos0cosx+sin0sinx=cosx ..proved😊
Good 👍
❤
Excellent.
Sir ji ne to time kharab kar diya achha khasa
Are Bhai DA method pura galat he
You say this type prove sin-x is sinx
Unit circle padhana chaiye sabko
Kaafi sari chije clear ho jati he
trigonometry ka clear view hota he aur isse compound angles ka bhi derivation geometrically nikal sakte he
Agar visualization achhi ho to koi bhi angle ka 1st quadrant me reflection konsi angle banayega yeh mind me nikal kar koi bhi 30 45 60 deg angle ke multiples wale angles nikal sakte he
Crystal clear from Afghanistan 🇦🇫❤❤
How do you know Hindi language?
Urdu hindi same same@@theFuture.IITIAN
@@LanceWilson_RYDER i didn't ask you
Maths ban nhi hai Afghanistan me?
kiu banned hoqa??? @@Bobby1998
Sir yahin se to mera sawal shuru hota hai ki , agar cos(-135) hua to cos(135) kaise likh sakte hain because ab ye 3rd quadrant mein lie karega to ab x co-ordinate -ve ho jaega and cos(-135) = - cos(135) hona chahiye. But fir hum ye kaise keh dete hain ki cos(-x)=cos x for all values . Because ye to sirf 4th quadrant ke liye hi sahi hoga .
Find cos minus 135 and cos 135 .Both are same , minus 1 by root 2. Similarly Find for any angle
@@deepakd4148yes, the value of cosx doesn't change whether the angle is x or -x. But, for sin, it does.
Sir we can also do this by the Cos(x) graph. As cosine is an even function, the positive and negative angles give equal value due to symmetry...
Now I will ask the same question to my friends😂
😁
Your friends also watching this video
Agar unme se kisi ek ko bhi pata hoga
Toh tera popat ho jaayega
@@deepanshu17200 😂😂😂
Sir ji mere sabhi students ko pta h 😂
Well defined thank you sir
Very informative vedio
Thanks you
You are great and down to earth mathematician, that actually overpass according to me, the so called known greatest mathematician. Knowledge lies in sharing the unknown aka doubtful.
Sir please make a video on Significant figure and rules for IIT JEE
Itna karne ke koi jarurat nahi thi.
Cosx ki symmetric about y axis.
f(x)=f(-x) for even function
Nice explain sir.Krware rho sir
Cos x is even fn and even fn have a property f(-x)=f(x)
Intresting sir g.
V good pls keep solving such basic logical question as always thnk u sir
Awesome sir banki sir aaj tak kya samjhate the yesamjaj hi nai aaya
Nice video
1:15
Sir is tarike se to sec(x) =sec(-x) hona chahiye
Sir aap maths ke aht achhe teacher hai
Sir graph m y axis k about symmetry se bhi kr skte hai kya
Explanation style is ultra pro 💯💯🙏🙏
Sometime everything is easy until you start 😊
Well asked questions
0-x se bhi kar sakte haina
Crystal clear from Bangladesh..BD🥰
Waah sir G❤
Aap ISI(INDIAN STATISTICAL INSTITUTE) UGA AND UGB KA TAIYYARI KARWAIYE please
Ek baich lonch kariye
Sir, You are my favourite maths teacher
Sir could you please make a video on chapter sequence of class 11th and 12th.i am facing trouble in my study.this is kindly requested plz plz plz plz....
Best teacher of mathematics
Thumbnail wrong hai kyuki cos (-120) not equal to cos(120) because third quadrant mai cos -ve hota hai
Bhai angle 0 to 90 k beech m hoga
@@Kartikkaushik2009 0 to -90 ho tab possible kyu ki 4th quadrant mai cos@ always positive hoti hai
Cos(-120)=cos120=-(1/2)
@@IftikharAhmad-vu7eq right
Our teacher said this and explained it totally and said the same thing for sin and tan
Sur symmetry about Y axis in Cos x graph can easily assure this if I am right🙂
Sir, can you make a video on series expansion?
Can We say the same thing using the graph of cosine fxn that it is symmetrical across the y axis , so it is an even fxn, so f(x) = f(-x) ? BTW ❤ from WEST BENGAL 😊😊😊
Sir please solve integration of whole root of 1+tanx dx
I can't solve it😢😢😢😢
I hav posted this question in your previous vidio also...
1+tanx=t²
@@syed3344are you stupid or something?
And also find root(1+tanx)=t
@@hritamkashyap tf will you do with that? Once you differentiate both sides to get dt in terms of dx there will be a term of sec^2x. What will you do with that? Unless you want to replace it in terms of t too and then proceed, which could worm.
It is not that easy bro
Mathematical induction and statistics old videos
What if x ek obtuse angle ho
Cos(-x) to fir 3rd quadrant me lie karega na
Thank you sir
Sir aap best main toh sari padai Aman Malik sir bolkar yt se karyati hu
Sir ap bohot busy rehte ho sayad reply nehi dogi
but sir lots of respectss 🎓👑👑
❤❤
Also we can go through expansion of cos x
Just I was studying trigonometry and this question came in my mind and see the solution came❤
Sir yaha se tan x ki definition samjha dijiye.
Sir solve this 3/-100???kya hogee
Why cos make angle with x-axis and sin make y-axis
Sir complex no please upload Karo
Just draw its graph.
Too easy😀
And cos 210 is ?
Thanks sir ❤❤❤
❤❤❤thanx sir
Hamare Ashish sir ne hame bataya hai
Watching from bangladesh
Thanks sir 😊
proud to say ashish sir Explained this a month ago
@@uttamchaurasiya-zk5hk indeed, sir tells all the derivations and all the logics, it feels so good studying maths when everything has a logic and no steric hinderance, back bonding 🤣🤣
@@imsparshytbro is trying to roast a
particular subject 😂
@@RohitSharma-pr5rk doesn't matter roasting bro.. we gotta study all anyways🤣😂
@@imsparshyt are u in 11th?
@@RohitSharma-pr5rk 13
So we can say that 270=-90
In jee advance air 1 is bhannat sir
❤
Crystal clear from antartica 🇦🇱
Do you understand Hindi ?
😂😂😂
Legends of SL loney
👍
Angle -x kaise huaa
Good
My teacher told me write it as cos (0-x)
Cos x
Why r will not become minus r sir
Radius cannot be negative
ASTC rule exists!!!
Damn
🛑🛑*****4^sin^2 A + 4^cos^2 A = ??*****🛑🛑
⁉️⁉️⁉️⁉️⁉️⁉️⁉️❓❓❓❓❓❓🛑🛑
Vg sir student already know this
Ye Anna sir ne class main samjhaya tha
What if angle is in 3rd or 2nd quadrant ?
😅😊 nice 👍👍👍👍👍👍👍👍👍👍👍👍🙂🙂🙂😊
series expansion
Plz sir....
I know this from the start
Are sir y sub bhut phle pad chuke h jnte h sub isi circle se bne hue h
Good evening sir
❤❤❤❤❤❤❤❤❤❤❤
Are sir Galt method hai kyuki geometrical angle Kabhi negative nhi HOTA😢
You are wrong bro clockwise it is -ve and anticlockwise it's+ve
Ye cheej graph se bhi samajh me aati hai
ᴀᴀꜱɪꜱʜ ꜱɪʀ ɴᴇ ʙᴛᴀyᴀ ᴛʜᴀ 😊❤😊 ᴛq ᴀᴀꜱɪꜱʜ ꜱɪʀ ᴀɴᴅ ᴀᴩᴋᴏ ʙʜɪ ᴛq ꜱɪʀ ....yᴇ ᴠɪᴅᴇᴏ ᴋᴀ ᴛʜᴜᴍʙɴᴀɪʟ ᴅᴇᴋʜɴᴇ ᴩʀ yᴅ ᴀᴀɢyᴀ ❤❤❤❤❤❤❤
Class 10 ki adv.maths book pr ye chij lika hai😂😂😂
Sir ap BSc maths bhi padha ow please
Ashish sir told this in his trigonometry lecture recently
Are Gajab yrrr...........😂😂
Gahan hai , sir
khna kya chahte hooo
Hh
Incomplete explaination
Itni fuddu si baat ke liye itna mahaul bana diya...cos(x) ye even function bhi h....aajkal RUclips wala teacher sab chhoti chhoti baat ke liye mahaul poora bana deta hai
Shi bola 😂😂
Itna tabiyat se aap padhate hai, muh se jyada hath chalta hai lekin aisa lgta hai knowledge me khi kmi hai kyonki aap hamesha ulta sidha question copy kar ke late hai.
Are sir method Galt hai kyuki geometrical angle Kabhi negative nhi HOTA 😢
clockwise may angle negative hota hay
❤❤