### Home > CCG > Chapter 12 > Lesson 12.1.2 > Problem 12-30

12-30.

Examine the diagram at right.

Explain why

and. Use the diagram to write

? According to this diagram, what is

? Explain how you know. Use the Pythagorean Theorem and your answer from part (a).

Does this relationship appear true for all angles? Use your calculator to find

and . Write down your findings. Yes.