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Insanely easy question  trig functions, need a quick question answered 
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#1
Apr709, 05:39 AM

P: 47

1. The problem statement, all variables and given/known data
I need to solve the equation [tex]cos 5x + cos 3x = cos x[/tex] Do the first two terms add together to be cos 8x? Then use double angle formula to solve? 


#2
Apr709, 05:45 AM

HW Helper
P: 4,433

Use formula to convert sum of trig. function to product form. 


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