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).
Explore Trigonometric Identities: Cofunction, Negative Angle, and Pythagorean Identities
Basic Trigonometric Identities: Pythagorean Identities and Cofunction Identities
Lesson: Evaluating Trigonometric Functions Using Cofunction Identities
Trigonometry: Negative Angle Identities - Expii
Trigonometric Functions - Expii
Cofunction Identities (Trigonometry)
Evaluate Trigonometric Expressions with Cofunction Identity
Classifying Common Functions - Expii Graphing linear equations, Polynomial graph, Polynomials
Trigonometry: Half-Angle Identities - Expii