All High School Math Resources
Example Question #43 : Pre Calculus
Example Question #1 : Using Pythagorean Identities
Example Question #2 : Using Pythagorean Identities
Remember that . We can rearrange this to simplify our given equation:
Example Question #3 : Using Pythagorean Identities
This is the most simplified version.
Whenever you see a trigonometric function squared, start looking for a Pythagorean identity.
The two identities used in this problem are and .
Substitute and solve.