### Home > PC > Chapter 11 > Lesson 11.1.2 > Problem 11-23

11-23.

In the diagram at right, the point has Cartesian coordinates

Explain why

.Using the diagram,

. Find

in terms ofand. Using the diagram,

? Find

in terms ofand.What theorem can be used to relate the three sides of a right triangle?

Find

*θ*in terms ofand.Use tangent.