Math
Cofunction Calculator
Apply cofunction identities like sin θ = cos(90° − θ).
Did this calculator solve your problem today?
✓ Thank you for your feedback!
Report issue to loopingon.com
Sponsored
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°.
Worked Example
sin(30°) = cos(60°) = 0.5.
Frequently Asked Questions
What are complementary angles?
Two angles that sum to 90°.
Advertisement