Trigonometry: Co-Function Identities - Expii

The co-function identities relate "co-pairs" of trig functions at x and π/2 - x. For example, sin(π/2 - x) = cos(x), cos(π/2 - x) = sin(x), tan(π/2 - x) = cot(x), and cot(π/2 - x) = tan(x).

Cofunction Identities ❖ Trigonometry

Trigonometry - Cofunction identities

PreCalculus - Trigonometry: Trig Identities (12 of 57) Proving the Cofunction Idenity

PreCalculus - Trigonometry: Trig Identities (12 of 57) Proving the Cofunction Idenity

Summary of trigonometric identities

Summary of trigonometric identities

Trigonometry: Half-Angle Identities - Expii

Explore Trigonometric Identities: Cofunction, Negative Angle, and Pythagorean Identities

Solve Trigonometric Equations Using the Unit Circle - Expii

Evaluate Trigonometric Expressions with Cofunction Identity

Explore Trigonometric Identities: Cofunction, Negative Angle, and Pythagorean Identities

Trigonometry - Cofunction identities

PreCalculus - Trigonometry: Trig Identities (12 of 57) Proving the Cofunction Idenity

Use cofunction identities and trig identities to find the indicated trig functions