log(x)*sin(x)
d --(log(x)*sin(x)) dx
Apply the product rule:
f(x)=log(x)f{\left(x \right)} = \log{\left(x \right)}f(x)=log(x); to find ddxf(x)\frac{d}{d x} f{\left(x \right)}dxdf(x):
The derivative of log(x)\log{\left(x \right)}log(x) is 1x\frac{1}{x}x1.
g(x)=sin(x)g{\left(x \right)} = \sin{\left(x \right)}g(x)=sin(x); to find ddxg(x)\frac{d}{d x} g{\left(x \right)}dxdg(x):
The derivative of sine is cosine:
The result is: log(x)cos(x)+sin(x)x\log{\left(x \right)} \cos{\left(x \right)} + \frac{\sin{\left(x \right)}}{x}log(x)cos(x)+xsin(x)
The answer is:
sin(x) ------ + cos(x)*log(x) x
sin(x) 2*cos(x) - ------ - log(x)*sin(x) + -------- 2 x x
3*sin(x) 3*cos(x) 2*sin(x) -cos(x)*log(x) - -------- - -------- + -------- x 2 3 x x