SOLUTION: If 0 less than or equal to theta less than or equal to 2pi, find the value(s) of theta that make the following statement true: cos2 theta = 1. Express your answer in radians.

Question 845480: If 0 less than or equal to theta less than or equal to 2pi, find the value(s) of theta that make the following statement true: cos2 theta = 1. Express your answer in radians.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If 0 <= t <= 2pi, find the value(s) of t that make the following statement true: cos^2(t) = 1. Express your answer in radians.
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(cos^2(t)-1) = 0
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Factor:
(cos(t)-1)(cos(t)+1) = 0
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cos(t) = 1 or cos(t) = -1
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t = 0,2pi or t = pi
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Cheers,
Stan H.
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