### Home > INT3 > Chapter 9 > Lesson 9.1.4 > Problem 9-55

9-55.

Daniel sketches the graphs at right for

*y*= sin(*θ*) and*y*= cos(*θ*). Homework Help ✎Unfortunately, he forgets to label the graphs, and now he cannot remember which graph goes with which equation. Explain to Daniel how he can tell (and remember!) which graph is

*y*= sin(*θ*) and which is*y*= cos(*θ*).

Look at the *y*-intercepts. What is cos(0°)? sin(0°)?