Example 1

Author:: Walch Education

Find

if

.

GeoGebra Applet

Set up the identity.
Substitute the values of the angles into the identity and simplify.
Verify the identity by calculating the sine of and the cosine of using a scientific calculator.

This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.

Discover Resources

New Resources