Prove: i^4⁡= 1

Complex Numbers: Prove: i^4⁡= 1.
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Complex Numbers • Prove:⁡⁡ (a⁡+⁡b⁡i)(c⁡...
Conversions
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Logarithms, etc. • Logarithms, etc.
Analytic Geometry • Analytic Geometry
Plane Trigonometry Basics • Plane Trigonometry Basics
Trigonometric Formulas • Trigonometric Formulas
The Exact Values of sin & cos Functions of a Right Triangle • The Exact Values of si...
Trigonometric Identities
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Trigonometric Identities 2 • Trigonometric Identiti...
Trigonometric Identities 3 • Trigonometric Identiti...
Fractions
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Division of Polynomials, etc. • Division of Polynomial...
The Binomial Theorem
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Quadratic Equation and Formula, etc. • Quadratic Equation and...
Exponents and Radicals • Exponents and Radicals
Systems of first degree/linear equations • Systems of first degre...