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Posted by on Thursday, May 28, 2009 at 6:09am.

Prove the identity:
1-cos2x/sin2x = 1+tanx/1+cotx

I simplified the RS to tanx.
LS:(1-2cos²x+1)/2sinxcosx
(2+2cos²x)/2sinxcosx

How do I simplify the rest?

  • math - , Thursday, May 28, 2009 at 7:19am

    change the LS to
    (1 - (1 - 2sin²x))/(2sinxcosx)
    = 2sin²x/(2sinxcox)
    = sinx/cosx
    = tanx = RS

  • math - , Thursday, May 28, 2009 at 7:28am

    thanks! I've been trying to get this one for quite awhile. So many options to choose :(

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