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

10-188.

Solve each equation for 0º ≤

*θ*< 360º. You may need your calculator, but remember that your calculator only gives*one*answer. Most of these problems have more than one answer. Think about all four quadrants of a graph. Homework Help ✎sin(

*θ*) = 0.5cos(

*θ*) = –0.54tan(

*θ*) – 4 = 03sin

^{2}(*θ*) = 1

Where is the sin*θ* = 0.5? Remember sin is the *y*-value. What would *θ* be at those places?

*θ* = 30° or 150°

Where is the cos*θ* = −0.5? Remember cos is the *x*-value. What would *θ* be at those places?

Solve for the tan*θ*. Draw a unit circle. Where is the tan*θ* 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!