secx = (2(cosxsin2x - sinxcos2x))/sin2x
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Originally Posted by sophiaroth secx = (2(cosxsin2x - sinxcos2x))/sin2x
thanks! i had tried cos2x = cos^2x - sin^2x, and never went as far as 2cos^2x - 1
Originally Posted by sophiaroth secx = (2(cosxsin2x - sinxcos2x))/sin2x just to get rid of few steps
Last edited by great_math; June 19th 2009 at 04:20 AM.
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