1 - cos(x) ---------- 2 x
(1 - cos(x))/x^2
Apply the quotient rule, which is:
and .
To find :
Differentiate term by term:
The derivative of the constant is zero.
The derivative of a constant times a function is the constant times the derivative of the function.
The derivative of cosine is negative sine:
So, the result is:
The result is:
To find :
Apply the power rule: goes to
Now plug in to the quotient rule:
Now simplify:
The answer is:
sin(x) 2*(1 - cos(x)) ------ - -------------- 2 3 x x
6*(-1 + cos(x)) 4*sin(x) - --------------- - -------- + cos(x) 2 x x ------------------------------------- 2 x
6*cos(x) 18*sin(x) 24*(-1 + cos(x)) -sin(x) - -------- + --------- + ---------------- x 2 3 x x ------------------------------------------------- 2 x