Calculate:
d/dx[(e^x + xsin(x))/(tan(x))]
I got this far:
[tan(x) * e^x + 1cos(x)]-[e^x + xsin(x) * sex^2(x)]/[tan(x)]
But my book says it's supposed to be;
[tan(x) * e^x + sin(x) + xcos(x)]-[e^x + xsin(x) * sex^2(x)]/[tan(x)]
How come those things...?