Tích phân hàm số toán cosecant

$\int \csc axdx=\frac{1}{a}\ln |\csc ax-\cot ax|+C$

$\int {\csc }^{2}xdx=-\cot x+C$

$\int {\csc }^{n}axdx=-\frac{{\csc }^{n-1}ax\cos ax}{a(n-1)}+\frac{n-2}{n-1}\int {\csc }^{n-2}axdx\text{ (for }n\ne 1\text{)}$