Sin, Cos and Tan of Sum and Difference of Two Angles

The sine of the sum and difference of two angles is as follows.learn more:

Tan of Sum and Difference of Two Angles

sin(α + β) = sin α cos β + cos α sin β

sin(α − β) = sin α cos β − cos α sin β

The cosine of the sum and difference of two angles is as follows:

cos(α + β) = cos α cos β − sin α sin β
cos(α − β) = cos α cos β + sin α sin β