SOLUTION: I'm stumped on this question. Thanks for the help. Verify the identity:(cos3x-cosx)/(sin3x-sinx)=-tanx

Algebra ->  Trigonometry-basics -> SOLUTION: I'm stumped on this question. Thanks for the help. Verify the identity:(cos3x-cosx)/(sin3x-sinx)=-tanx      Log On


   

Question 953816: I'm stumped on this question. Thanks for the help.
Verify the identity:(cos3x-cosx)/(sin3x-sinx)=-tanx
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Is it cos(3x) ?
or cos^3(x) ?