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December 20, 2014

December 20, 2014

Posted by **Maria** on Monday, November 19, 2012 at 4:06am.

ive tried this problem so many times I need help with it...

- trigonometry -
**Reiny**, Monday, November 19, 2012 at 7:53amI believe you mean

(1+sin2x + cos2x)/(1+sin2x - cos2x)

= (sin^2 x + cos^2 x + 2sinxcosx + cos^2 x - sin^2x)/(sin^2 x + cos^2 x + 2sinxcosx - cos^2x + sin^2x)

= (2cos^2 x + 2sinxcosx)/(2sin^2 x + 2sinxcosx)

= 2cosx(cosx+sinx)/((2sinx(sinx+cos))

= 2cosx/2sinx

= cot x

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