please help with all of 1
1.) A.) f(x) = cos(x) = sin (x) C.)f(x) = e*- ex E.) f(x) = sin²(x) + 3cos² (x) Find the following derivatives [8K] B.) f(x) = -cos(x² + x) D.)f(x) = √x F.) f(x) = cos(x)2x