题目
int((1)/(sin^2 x)+1)d(sin x)= ().A. -(1)/(sin x)+sin x+CB. (1)/(sin x)+sin x+CC. -cot x+sin x+CD. cot x+sin x+C
$\int\left(\frac{1}{\sin^2 x}+1\right)d(\sin x)=$ ().
A. $-\frac{1}{\sin x}+\sin x+C$
B. $\frac{1}{\sin x}+\sin x+C$
C. $-\cot x+\sin x+C$
D. $\cot x+\sin x+C$
题目解答
答案
A. $-\frac{1}{\sin x}+\sin x+C$