Question

find derivtives of function x³- cosx ​

Answer 1

Answer:

$3{x}^{2} + \sin(x)$

Explanation:

$\frac{d(x^{3} - \cos x)}{dx} \\ \frac{d(x^{3})}{dx} \: - \: \frac{d (cosx) }{dx} \\ 3 {x}^{2} - \: ( - \sin(x)) \\ \sin(x) + 3 {x}^{2}$