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September 21, 2014

September 21, 2014

Posted by **Matthew** on Sunday, May 19, 2013 at 6:23am.

Sin2x - sinx/cosx + cos2x= sinx/cosx + 1

- Math -
**Reiny**, Sunday, May 19, 2013 at 8:00amYou typed it incorrectly, you must mean:

(sin(2x) - sinx)/(cosx + cos(2x)) = sinx/(cosx + 1)

LS = (2sinxcosx - sinx)/(cosx + 2cos^2 x - 1)

= sinx(2cosx -1)/( (2cosx - 1)(cosx+1) )

= sinx/(cosx + 1)

= RS

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