Please solve

3./ cos3x - sin 3x + 2cosx = 0

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- Jul 21st 2009, 09:04 AMmp3qzSolving a trig equation
Please solve

3./ cos3x - sin 3x + 2cosx = 0 - Jul 22nd 2009, 03:22 PMpickslides
- Jul 23rd 2009, 09:13 AMred_dog
Using the hint of pickslides the equation becomes

which is the same equation like in this thread: http://www.mathhelpforum.com/math-he...-equation.html