# Given #cos(pi/2-x)=3/5, cosx=4/5# to find the remaining trigonometric function?

##### 1 Answer

Jan 5, 2017

To find the value of the sine, use the identity for the cosine of the difference of two angles:

#### Explanation:

The identity for the cosine of the difference of two angles is:

Given:

The first term on the right disappears, because