New kid on the Block
exsinx+cosx(x4cos3x-x sinx+cos)(x2cos2x)
Blazing goIITian
xpower4coscubex-xsinx+cosx/xsquarecossquare=xsquarecosx-tanxsecx/x+secx/x.now try.if u are not able to do then i will give u full proof.
i am unable to do it.Please give me the proof.