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Câu hỏi: Cho $\int{\sin dx=F\left( x \right)}+C$ Khẳng định nào dưới đây đúng?
A. $F'\left( x \right)=\cos x$. $F'\left( x \right)=-\operatorname{s}\text{inx}$
B. $F'\left( x \right)=-\cos x$.
C. $F'\left( x \right)=\operatorname{s}\text{inx}$.
D. $F'\left( x \right)=-\operatorname{s}\text{inx}$.
A. $F'\left( x \right)=\cos x$. $F'\left( x \right)=-\operatorname{s}\text{inx}$
B. $F'\left( x \right)=-\cos x$.
C. $F'\left( x \right)=\operatorname{s}\text{inx}$.
D. $F'\left( x \right)=-\operatorname{s}\text{inx}$.
Ta có $\int{\sin x}\text{d}x=F\left( x \right)+C\Leftrightarrow {F}'\left( x \right)=\sin x$.
Đáp án C.