### Home > A2C > Chapter Ch10 > Lesson 10.1.1 > Problem 10-15

10-15.

Solve each equation for 0 ≤

*θ*≤ 360. 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. Homework Help ✎sin

*θ*= 0.5cos

*θ*= −0.54 tan

*θ*− 4 = 03 sin

^{2}*θ*= 1

Remember the angles from special right triangles.

30° and ?

120° and ?

Simplify the equation first.

This is not one of the special angles.

Use a calculator to find one answer.

Looking at a unit circle may help you find the other answer.

35.26°, 144.74°, 215.26° and 324.76°