Trigonometric Sum and Difference Calculator

Angle u:
Angle v:
Results:

cosα+cosβ=2cos[(α+β)/2]·cos[(α-β)/2]

sinα+sinβ=2sin[(α+β)/2]·cos[(α-β)/2]

cosα-cosβ=-2sin[(α+β)/2]·sin[(α-β)/2]

sinα-sinβ=2cos[(α+β)/2]·sin[(α-β)/2]