Cofunction Identities

Front

What is the cofunction identity for sine?

Back

sin(θ) = cos(90° - θ)

Front

What is the cofunction identity for cosine?

Back

cos(θ) = sin(90° - θ)

Front

What is the cofunction identity for tangent?

Back

tan(θ) = cot(90° - θ)

Front

What is the cofunction identity for cotangent?

Back

cot(θ) = tan(90° - θ)

Front

What is the cofunction identity for secant?

Back

sec(θ) = csc(90° - θ)

Front

What is the cofunction identity for cosecant?

Back

csc(θ) = sec(90° - θ)

Front

If sin x = cos x, what is the value of x?

Back

45°

Front

sin(30°) = ?

Back

cos(60°)

Front

sin(45°) = ?

Back

cos(45°)

Front

sin(60°) = ?

Back

cos(30°)