SOLUTION: Find to the nearest degree all values of theta in the interval 0 degrees is less than or equal to theta which is less than or equal to 180 degrees that satisfy the equation 8cos(sq

Question 310723: Find to the nearest degree all values of theta in the interval 0 degrees is less than or equal to theta which is less than or equal to 180 degrees that satisfy the equation 8cos(squared)theta-2cos(theta)-1=0
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find to the nearest degree all values of theta in the interval 0 degrees is less than or equal to theta which is less than or equal to 180 degrees that satisfy the equation
8cos(squared)theta-2cos(theta)-1=0
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Factor:
(4cos(x)+1)(2cos(x)-1) = 0
---
cos(x) = -1/4 or cos(x) = 1/2
x = 104.48 deg or x = 60 deg.
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Cheers,
Stan H.
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