SOLUTION: solve: cos -1(small in the upper righthand corner)x + cos -1(small in the upper right hand corner) 2x= 60degrees

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Question 117789: solve:
cos -1(small in the upper righthand corner)x + cos -1(small in the upper right hand corner) 2x= 60degrees
Answer by stanbon(48558) About Me  (Show Source):
You can put this solution on YOUR website!
solve:
cos -1(small in the upper righthand corner)x + cos -1(small in the upper right hand corner) 2x= 60degrees
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cos^-1(x) + cos^-1(2x) = 60 degrees
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Take the cos of both sides to get:
x + 2x = cos(60)
x + 2x = 1/2
3x= 1/2
x = 1/6
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Cheers,
Stan H.