### Home > CCA2 > Chapter Ch12 > Lesson 12.1.1 > Problem 12-15

12-15.

If

Graph each function using the input bar below or on your graphing calculator. What do you observe about the -values when

^{3π}/

_{2}?

When graphing using the input bar, sin(

sin(

*θ*)The

-values are negative.cos(

*θ*)Use the same method as part (a). It might also help to think about how the sin(

) and cos( ) graphs relate to each other. tan(

*θ*)Use the same method as part (a).

positive

Does taking the reciprocal of something change its sign?