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A.sin                                     B.-sin

C.cos                                      D.-cos

A.                B.-                C.                 D.-

A.-sin²                                         B.-sin²

C.-cos·sin²                             D.sin·sin

(1)y=f();

(2)y=f().

(1)y=x;

(2)y=x·.

(1)y=(a+bxⁿ)^m;

(2)y=ln3;

(3)y=3;

(4)y=sin³(x+).

(1)f′(x);

(2)f(x)圖象在點(8,)處的切線方程.