CALCULATOR
Sine of Sum of Two Angles Calculator
Sine of Sum of Two Angles. Example: A: 30 degrees, B: 30 degrees gives 0.866025403784 number. Sine sum only; other function/difference identities deferred. Original useful product scope; historical catalog title does not grant missing modes or source parity.
Sine sum only; other function/difference identities deferred. Original useful product scope; historical catalog title does not grant missing modes or source parity. Derivation: Rotate unit circle twice, or expand product of rotation matrices.
Accepted inputs: A: -90 to 90 degrees; B: -90 to 90 degrees.
How the calculation works
sin(a+b)=sin a cos b+cos a sin b
Worked example
With a 30 degrees, b 30 degrees, sine of sum of two angles is 0.8660254038 number.
Assumptions and limits
Sine sum only; other function/difference identities deferred. Original useful product scope; historical catalog title does not grant missing modes or source parity. Derivation: Rotate unit circle twice, or expand product of rotation matrices.