### Home > PC > Chapter 10 > Lesson 10.1.1 > Problem 10-9

10-9.

Solve the trigonometric equations for the variable in the given interval.

Solve this equation using the same steps as you would to solve the equation

. How do you 'undo' the sine function?

You will need to use the

key on your calculator. Remember that your calculator will only give one answer. Draw a unit cirlce to find the 2nd answer. Recall that

.

Solve this equation using the same steps as you wold to solve the equation

. Don't forget the ± sign.

You do not need your calculator and should find 4 solutions.