cot−11−x2x\cot ^{-1} \frac{\sqrt{1-x^{2}}}{x}cot−1x1−x2
cot−1x1−x2\cot ^{-1} \frac{x}{\sqrt{1-x^{2}}}cot−11−x2x
cot−11−x2\cot ^{-1} \sqrt{1-x^{2}}cot−11−x2
cot−111−x2\cot ^{-1} \frac{1}{\sqrt{1-x^{2}}}cot−11−x21
