Cofunction Identities

Front

What is the cofunction identity for sine and cosine?

Back

sin(θ) = cos(90° - θ)

Front

What is the value of sin(45°)?

Back

sin(45°) = cos(45°) = √2/2

Front

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

Back

x = 45°

Front

What is the missing number? Sin(θ) = Cos(80°)

Back

θ = 10°

Front

What is the relationship between angles x and y if sin x = cos y?

Back

x + y = 90°

Front

What is the value of sin(30°)?

Back

sin(30°) = 1/2

Front

What is the value of cos(60°)?

Back

cos(60°) = 1/2

Front

If sin(θ) = 0.5, what are the possible values of θ?

Back

θ = 30° or θ = 150°

Front

What is the cofunction identity for tangent and cotangent?

Back

tan(θ) = cot(90° - θ)

Front

What is the value of sin(90°)?

Back

sin(90°) = 1