SOLUTION: Solve the equation 4 times cosine of theta plus 1 = 2 times cosine of theta for theta greater than or equal to 0 but less than 2 pi..

Question 826919: Solve the equation 4 times cosine of theta plus 1 = 2 times cosine of theta for theta greater than or equal to 0 but less than 2 pi..
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solve the equation 4 times cosine of theta plus 1 = 2 times cosine of theta for theta greater than or equal to 0 but less than 2 pi..
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4cos(t)+1 = 2cos(t) for 0<= t <2pi
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2cos(t) = -1
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cos(t) = -1/2
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t = 180-60 or 180+60
t = 120 degrees or 240 degrees
t = (2/3)pi or (4/3)pi radians
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Cheers,
Stan H.
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