### Home > INT3 > Chapter Ch12 > Lesson 12.1.1 > Problem 12-13

12-13.

If

*π*<*θ*<, what is the sign of each expression? Homework Help ✎ sin(

*θ*)cos(

*θ*)tan(

*θ*)

You are in the third quadrant.

What are the signs of *x* and *y* in the third quadrant?

The *y*-values are negative.

Use the same method as part (a). It might also help to think about how the sin(*x*) and cos(*x*) graphs relate to each other.

Use the same method as part (a).

Negative

Does taking the reciprocal of something change its sign?