sin(x) 2/3 ------ + x *cos(x) 2 x
d /sin(x) 2/3 \ --|------ + x *cos(x)| dx| 2 | \ x /
Differentiate term by term:
Apply the quotient rule, which is:
and .
To find :
The derivative of sine is cosine:
To find :
Apply the power rule: goes to
Now plug in to the quotient rule:
Apply the product rule:
; to find :
Apply the power rule: goes to
; to find :
The derivative of cosine is negative sine:
The result is:
The result is:
Now simplify:
The answer is:
cos(x) 2/3 2*sin(x) 2*cos(x) ------ - x *sin(x) - -------- + -------- 2 3 3 ___ x x 3*\/ x
sin(x) 2/3 4*cos(x) 6*sin(x) 4*sin(x) 2*cos(x) - ------ - x *cos(x) - -------- + -------- - -------- - -------- 2 3 4 3 ___ 4/3 x x x 3*\/ x 9*x
2/3 cos(x) 24*sin(x) 2*cos(x) 6*sin(x) 18*cos(x) 2*sin(x) 8*cos(x) x *sin(x) - ------ - --------- - -------- + -------- + --------- + -------- + -------- 2 5 3 ___ 3 4 4/3 7/3 x x \/ x x x 3*x 27*x