### Home > INT3 > Chapter 10 > Lesson 10.3.2 > Problem 10-168

10-168.

Without a calculator, what are two solutions to each of the following equations for 0º ≤ *θ*< 360º? Homework Help ✎cos(

*θ*) =tan(

*θ*) = –1sin(

*θ*) =cos(

*θ*) = –

Draw a unit circle.

Answers: 60° and 300°

135° and 315°

Draw and label a unit circle as in part (a). Don't forget that the sine is the *y*-value! Which quadrants will the angles be in?

See part (c).