Prove the following identities?

Cscx-sinx/secx=cos^3x

1 Answer
Mar 13, 2018

Couldn't prove because they aren't equal

Explanation:

#(Cscx-sinx)/secx=cos^3x#

#(1/sinx-sin^2x/sinx)/(1/cosx)=cos^3x#
#((1-sin^2x)/sinx)*cosx=cos^3x#
#((cos^2x)/sinx)*cosx=cos^3x#
#cos^3x/sinx=cos^3x#

They are not equal...