When the trig function has a power, it will have to be solved by extracting square roots or factoring. Example 1:
Solution:
Example 2: Solution:
Remember to first solve for the trig function and then solve for the angle value. Example:
Solution:
If there is more than
one trig function in the equation,
Example:
Solution:
There are trig equations, just like there are normal equations, where factoring does not work!! In these cases, the quadratic formula comes in handy. Example:
Solution: Since there are two trig
functions in this problem, we need to use an identity Using the quadratic formula, we get:
