# 4.2: Trig Proofs

Difficulty Level:

**At Grade**Created by: CK-12
*This activity is intended to supplement Trigonometry, Chapter 3, Lesson 2.*

## Problem 1 – Using the Calculator for verification

1. Prove: .

Verify the proof graphically. Enter the left side of the equation in and the right side of the equation in .

## Problem 2 - Confirm your findings

*For questions 2 through 5, prove the equation given and then verify it graphically. For , type . For , type .*

2.

3.

4.

5.

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## Date Created:

Feb 23, 2012## Last Modified:

Nov 04, 2014
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