SOLUTION: Find the general solution in degrees of the equation cos(5x - 20°) = cos 40°

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Question 860157: Find the general solution in degrees of the equation cos(5x - 20°) = cos 40°
Found 2 solutions by stanbon, Fombitz:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the general solution in degrees of the equation cos(5x - 20°) = cos 40°
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5x-20 = 40
5x = 60
x = 12
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Cheers,
Stan H.
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Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
5x-20=40 and 5x-20=-40 since cos%2840%29=cos%28-40%29
5x-20=40
5x=60
x=12
and
5x-20=-40
5x=-20
x=-4