# Trigonometry Examples

,

To find the value of , use the fact that then substitute in the known values.

Multiply the numerator by the reciprocal of the denominator.

Multiply by .

To find the value of , use the fact that then substitute in the known values.

Multiply the numerator by the reciprocal of the denominator.

Multiply by .

To find the value of , use the fact that so then substitute in the known values.

Cancel the common factor of .

Factor out the greatest common factor .

Cancel the common factor.

Rewrite the expression.

Multiply and .

To find the value of , use the fact that then substitute in the known values.

Multiply the numerator by the reciprocal of the denominator.

Multiply by .

The trig functions found are as follows: