SOLUTION: Solve the equation in the interval from 0 to 2pi. 3 cos 4theta = -2 Please help! Textbook does not explain this well.

Algebra ->  Trigonometry-basics -> SOLUTION: Solve the equation in the interval from 0 to 2pi. 3 cos 4theta = -2 Please help! Textbook does not explain this well.       Log On


   



Question 1015188: Solve the equation in the interval from 0 to 2pi.
3 cos 4theta = -2
Please help! Textbook does not explain this well.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Solve the equation in the interval from 0 to 2pi.
3 cos 4theta = -2
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Divide by 3.
Use a calculator to find 4*theta.
Divide by 4.