SOLUTION: solve for x for: sinx - sin2x = cosx on [-pi, pi]

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Question 985071: solve for x for: sinx - sin2x = cosx on [-pi, pi]
Found 2 solutions by Alan3354, Edwin McCravy:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Is it sin%5E2%28x%29 ?
Or sin%282x%29 ?

Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
sin(x) - sin(2x) = cos(x)

Any way you try this it always involves solving a 4th degree polynomial 
equation, so I'd just use a graphing calculator to solve it. 

Solutions:  -2.8084729373435, 1.2376766105486

Edwin