How this calculation works
Evaluate an angle sum by combining the two component angles.
THE FORMULA
sin(A+B)=sin A cos B+cos A sin B, cos(A+B)=cos A cos B−sin A sin BA worked example
30°+60° has sine 1 and cosine 0.
Good to know
Inputs are degrees.
Reference: OpenStax Algebra and Trigonometry (opens in a new tab) ↗
Read the result
Evaluate an angle sum by combining the two component angles.
The primary result is labeled “Sine of sum”. Keep the input definitions in view when comparing this result with another method.
Try a related calculation
Inputs are degrees.
For a related exercise, try the quadratic equation solver.
A few questions, answered
How can I check the default inputs by hand?
30°+60° has sine 1 and cosine 0.
Which rule does this calculator apply?
sin(A+B)=sin A cos B+cos A sin B, cos(A+B)=cos A cos B−sin A sin B