Question

ZYT

想問 倒數第二行怎麼變成最後一行的

錄
EX. Differentiate f(t)- sin ( cos( tan t))
= (
|||
sol: yo f(u), sinu. 8 (u) = cosa.
u g(x) = coux g'(x)=-binx
x=h(t), tant h' (t); sect
is f'(+) = f'(u) g'(x) n'(t)
-
- cosu sinx
D
- cos (cosctant)). sinctant). see t
•
.
11
seert

微積分

Answer 1

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shen

把u帶回去變成cosx
再把x帶回去變成tant