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Solve trigonometric equations involving specific angles and generalize solutions for unrestricted cases. Identify factors, write in terms of trigonometric functions, and solve for angles within set ranges. Divide by revolutions to find solutions.
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8.6 Trigonometric Equations Today’s Date: 5/2/17
Ex 1) Solve Treat the same as:
Ex 1) Solve 60 120 If NOT restricted to 0 θ 360°then need to generalize: • = 60 + n∙360 • = 120 + n∙360 • n is any integer
Ex 2) Solve Looks like: restricted! don’t have to generalize So, factor it: Set each factor = 0
Ex 3) Solve restricted! don’t have to generalize Looks like: 90 150 30 270
Ex 4) Solve Write in terms of same trig function: Looks like:
Ex 5) Solve So, (3 revolutions) 1st rev: 2nd rev: 3rd rev: So, we have: Divide by 3:
Homework #814 Pg. 522 1 – 53 EOO, skip 13, 17