# How do you find the exact value of #sin50cos25-cos50sin25# using the sum and difference, double angle or half angle formulas?

##### 1 Answer

May 11, 2018

sin 25

#### Explanation:

Use trig identity:

sin (a - b) = sin a.cos b - sin b.cos a

In this case:

sin (50 - 25) = sin 25