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April 19, 2014

Homework Help: trigonometry

Posted by aayush on Friday, January 25, 2008 at 12:47pm.

if sin2x=3sin2y,
prove that:
2tan(x-y)=tan(x+y)

( here, in sin2x, 2x is an angle., like there's a formula:sin2x=2sinxcosx and sin2y=2sinycosy; ....)

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