SOLUTION: Can you prove this identity: {{{sin(3x)/sin(x)}}} - {{{cos(3x)/cos(x)}}} = 2

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Question 608410: Can you prove this identity:
- = 2
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
Can you prove this identity:
- = 2
Get an LCD on the left side of sin(x)·cos(x) 



Use the identity sin(A)cos(B)-cos(A)sin(B) = sin(A-B) 





Use the identity sin(2θ) = 2sin(θ)·cos(θ)





2

Edwin
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