### Home > INT3 > Chapter 10 > Lesson 10.3.3 > Problem 10-188

10-188.

Solve each equation for *one* answer. Most of these problems have more than one answer. Think about all four quadrants of a graph.

Where is the

? Remember sin is the -value. What wouldbe at those places?or

Where is the

? Remember cos is the -value. What wouldbe at those places?

Solve for the

. Draw a unit circle. Where is the of that value?

Use your calculator to get one of the values. Then use symmetry to get the other 3 values. There are 4 values because when you take the square root of both sides the answer would be plus or minus!