22 cos (t)
d / 22 \ --\cos (t)/ dt
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
The derivative of cosine is negative sine:
The result of the chain rule is:
The answer is:
21 -22*cos (t)*sin(t)
20 / 2 2 \ 22*cos (t)*\- cos (t) + 21*sin (t)/
19 / 2 2 \ 88*cos (t)*\- 105*sin (t) + 16*cos (t)/*sin(t)