Math
Cofunction Calculator
Complement cofunctions: sin(90°−θ)=cos θ (θ in degrees).
Free to use — no sign-up or login.
sin(90°−θ)
cos θ
Amortization schedule
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This free Cofunction Calculator covers Complement cofunctions: sin(90°−θ)=cos θ (θ in degrees).
Sine and cosine (and the other pairs) swap on complementary angles. Related math tools sit beside How it works, with no account required.
Using the Cofunction Calculator
Complement cofunctions: sin(90°−θ)=cos θ (θ in degrees). Typical inputs are θ (°). How it works beside the form states the identity the Cofunction Calculator applies.
FAQ
How do I use the Cofunction Calculator?
Open the Cofunction Calculator, fill θ (°), and read the result. Sine and cosine (and the other pairs) swap on complementary angles.
What formula does the Cofunction Calculator use?
The Cofunction Calculator uses the identity in How it works. In words: Sine and cosine (and the other pairs) swap on complementary angles.