Question

f(x)=cos^2x+sin^2x
derivative

Answer 1

-2cos(x)sin(x)+2sin(x)cos(x) = 0

Answer 2

... since f(x) = 1!

Answer 3

did u consider this as basic and composite functions?
because they have different steps of solving it

Answer 4

2(cosx)*-sinx + 2(sinx)*cosx

-2cosxsinx + 2cosxsinx

0?

Answer 5

it is 0 because your function is the constant function
\[f(x)=1\]

Answer 6

so i dont need to show the working?

Answer 7

don't be hoodwinked in to finding the derivative using chain and product rule, that is a silly waste of time

Answer 8

but i love the chain rule : (

Answer 9

here is the work
\[\sin^2(x)+\cos^2(x)=1\]
\[\frac{d}{dx}[1]=0\]