sin−1x+cos−1x=π2\sin ^{-1} x+\cos ^{-1} x=\frac{\pi}{2}sin−1x+cos−1x=2π যখন x>1x>1x>1
tan−13+cot−13=π2\tan ^{-1} 3+\cot ^{-1} 3=\frac{\pi}{2}tan−13+cot−13=2π
sec−1y+cosec−1y=π2\sec ^{-1} y+\operatorname{cosec}^{-1} y=\frac{\pi}{2}sec−1y+cosec−1y=2π যখন y<1y<1y<1
sin−12+sec−112=π2\sin ^{-1} 2+\sec ^{-1} \frac{1}{2}=\frac{\pi}{2}sin−12+sec−121=2π
