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November 29, 2015
Posted by **ct** on Thursday, December 22, 2011 at 7:19pm.

- math -
**Reiny**, Thursday, December 22, 2011 at 8:03pmI will assume you meant

y = tan (x^2) / (1 + cosx)

by quotient rule,

dy/dx = ( (1+cosx)(sec^2 (x^2))(2x) - tan x^2 (-sinx) )/(1+cosx)^2

I don't know what level of simplification you need

y = e^(x^3) - tan 6x

dy/dx = (3x^2)e^(x^3) - 6 sec^2 (6x)