### Home > GC > Chapter 12 > Lesson 12.1.4 > Problem 12-38

12-38.

**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).

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

and . Write down your findings. Yes.