Cofunction Calculator

Apply cofunction identities like sin θ = cos(90° − θ).

Complement angle (°) 60

Function value 0.5

Formula: sin θ = cos(90° − θ), etc.

Step-by-step with your numbers:

1. Values used:

2. Angle = 30 °

4. Complement angle = 60°

5. Function value = 0.5

Did we solve your problem today?

Cofunction identities relate a trig function of an angle to the co-function of its complement.

The math behind it

sin θ = cos(90° − θ), tan θ = cot(90° − θ), and so on. The two angles add up to 90°.

sin(30°) = cos(60°) = 0.5.

What are complementary angles?

Two angles that sum to 90°.