### Home > PC > Chapter 4 > Lesson 4.1.4 > Problem 4-55

4-55.

Study the diagram of the unit circle below right, in which VW = 0.62. Homework Help ✎Find sin

*θ*.Find cos

*θ*.*α*is another angle with the same sine as*θ*, but a different cosine. What quadrant is*α*in?*β*is another angle with the same cosine as*θ*, but a different sine. What quadrant is*β*in?

In a unit circle, what is the radius?

You have two sides of a right triangle. Find the third side, which is the *x*-coordinate.

In Quadrant III, sine and cosine are both negative.

In which quadrant is sine negative and cosine positive?

In which quadrant is cosine negative and sine positive.