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July 29, 2016
Posted by **Anonymous** on Monday, November 3, 2008 at 9:42pm.

- calculus -
**drwls**, Tuesday, November 4, 2008 at 3:12amsin and cos are not inverse functions, in the sense that the sin of (cos x) is not equal to 1.

Cosx is the derivative of sinx, but

-sinx is the derivative of cos x.