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September 17, 2014

September 17, 2014

Posted by **raghunath laguri** on Friday, January 18, 2013 at 5:07pm.

- math -
**Steve**, Friday, January 18, 2013 at 5:35pmif y = sinx, y' = cosx

for sinx < 0, |sinx| = -sinx

so, y' = cosx * |sinx|/sinx, or

y' = |sinx| cotx

similarly for cosx

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