cos−1x2−12x2−1\cos ^{-1} \frac{\sqrt{x^{2}-1}}{\sqrt{2 x^{2}-1}}cos−12x2−1x2−1
tan−1x2−12x2−1\tan ^{-1} \frac{\sqrt{x^{2}-1}}{\sqrt{2 x^{2}-1}}tan−12x2−1x2−1
sin−1x2−12x2−1\sin ^{-1} \frac{\sqrt{x^{2}-1}}{\sqrt{2 x^{2}-1}}sin−12x2−1x2−1
cosec−1x2−12x2−1\operatorname{cosec}^{-1} \frac{\sqrt{\mathrm{x}^{2}-1}}{\sqrt{2 \mathrm{x}^{2}-1}}cosec−12x2−1x2−1
