I*n*sin(x)
(i*n)*sin(x)
The derivative of a constant times a function is the constant times the derivative of the function.
The derivative of sine is cosine:
So, the result is: incos(x)i n \cos{\left(x \right)}incos(x)
The answer is:
I*n*cos(x)
-I*n*sin(x)
-I*n*cos(x)