cos−1x+1−x2\cos ^{-1} x+\sqrt{1-x^{2}}cos−1x+1−x2
sin−1x+1−x2\sin ^{-1} x+\sqrt{1-x^{2}}sin−1x+1−x2
sin−1x−1−x2\sin ^{-1} x-\sqrt{1-x^{2}}sin−1x−1−x2
cot−1x+1−x2\cot ^{-1} x+\sqrt{1-x^{2}}cot−1x+1−x2
