SOLUTION: Find all angles, 0≤θ<360, that satisfy the equation below, to the nearest 10th of a degree.
2cos2θ+9=3cosθ+8
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Question 966798: Find all angles, 0≤θ<360, that satisfy the equation below, to the nearest 10th of a degree.
2cos2θ+9=3cosθ+8
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Find all angles, 0≤θ<360, that satisfy the equation below, to the nearest 10th of a degree.
2cos2θ+9=3cosθ+8
***
(4cosx+1)(cosx-1)=0
..
4cosx+1=0
cosx=-1/4
x=104.5˚, 255.5˚
or
cosx+1=0
cosx=-1
x=180˚
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