1.

int(2cosx)/(1-cos^2x)dx

Answer»

SOLUTION :`INT(2cosx)/(1-cos^2x)dx=2intcosx/(sin^2x)dx`
`2int(1)/sinx xxcosx/sin^2xdx`
=`2intcosecx XX cotxdx`
=`-2cosecx+C`


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