Question

Find the derivative w.r.t. x of (x+cos x )( x- tan x )

Answer 1

Answer:

let y=(x+cosx)(x-tanx)

Diff w.r.t. x

dy/dx =(x+cosx)d/dx (x-tanx) +(x-tanx)d/dx(x+cosx)

1. =(x+ccos