SOLUTION: Find the exact solution of the equation 2pi = 6cos^-1(3x). (The "6cos^-1" is cos inverse)

SOLUTION: Find the exact solution of the equation 2pi = 6cos^-1(3x). (The "6cos^-1" is cos inverse)

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Question 512065: Find the exact solution of the equation 2pi = 6cos^-1(3x).
(The "6cos^-1" is cos inverse)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the exact solution of the equation 2pi = 6cos^-1(3x).
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cos^-1(3x) = pi/3
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Take the cos of both sides to get:
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3x = cos(pi/3)
--
3x = 1/2
x = 1/6
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Cheers,
Stan H.
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