Law of Sines & Cosines Calculator

Select a law and choose which unknown to solve for. The calculator will compute the missing side or angle with detailed steps.

Enter Parameters

Select Law:

Solve for:

Angle

A

(°): Side

a

: Angle

B

(°):

Solves for side $b$ using: $b = a \frac{\sin (B)}{\sin (A)}$

Law of Sines & Cosines Calculator