Question

What is the derivative of 4sin(x)?

Answer 1

f(x) = 4sin(x)

f'(x) = [4sin(x)]' = 4[sin(x)]' = 4cos(x)

Answer 2

(
derivative of 4sin(x)
=(4)'*sin(x)+4*(sin(x))'

=0*sin(x)+4*(sin(x))'

=0*sin(x)+4*cos(x)

=4*cos(x)