Question

What is the derivative of `sinx/tanx` wrt `x`?

Answer 1

`d/dx(sinx/tanx) = -sinx`

Explanation:

`d/dx(sinx/tanx) = d/dx(sinx/(sinx/cosx))`

`" " = d/dx(sinx * cosx/sinx)`

`" " = d/dx(cosx)`

`" " = -sinx`