1. February 28 th copyright2009merrydavidson

2. 5-3SOLVING TRIG EQUATIONS Review: 1) Find all solutions, in degrees to: sin t = t = 30 0 + 360n 150 0 + 360n

3. 5-3SOLVING TRIG EQUATIONS Review: 2) Find all solutions, in radians to: cot A = 1

4. 5-3SOLVING TRIG EQUATIONS Let’s add more to the equation: 3) Find all positive solutions, in radians to: 2 sin A + 1 = 0 Subtract 1 Divide by 2 Find the angle(s)

5. 5-3SOLVING TRIG EQUATIONS Let’s add more to the equation: 4) Find all positive solutions, in radians to: csc x + 1 = 0 Subtract 1 Find the angle(s)

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7. 5)Solve: 5tanT = 3tanT - 2 for Collect like terms Isolate the trig function Find the angle(s) Be sure answer is within given domain.

8. 6) Solve: 2sin 2 u = 1 for Take the square root (be sure to use + when you take the square root) Isolate the trig function Find the angle(s)

9. 7) Solve: 2sin 2 u = sin u for

10. Nice web sites http://www.sosmath.com/algebr a/solve/solve9/s91/s91.html http://www.intmath.com/ analytic-trigonometry/5- trigonometric-equations.php

11. HW: WS 9-4