This document provides examples for solving trigonometric equations. It discusses that each trig function is positive a certain number of times and negative a certain number of times from 0 to 360 degrees. It explains that calculators only provide one answer but there may be multiple answers, and using a reference angle from the first quadrant allows finding other answers. It then provides 5 examples of solving trig equations, finding where trig functions are equal to given values, and checking solutions on a calculator.

1. Worksheet 11­1
2 1
1
1
13
12
5

2. Day 11­2: Trig Equations
From 0 to 360 degrees, each trig function is positive ___
times and negative ___ times.
positives negatives

3. The calculator tells you only ONE answer,
but there are at least TWO!
To backtrack to other answers, use a reference angle from QI.
inverse trig(#) = θ
ex. 1: Where is
ex. 2: Where is
check on TI:

4. ex. 3: Solve
ex. 4: Solve

5. ex. 4: in degrees
ex. 5: in radians