defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Trigonometry Inverse Trigonometric Functions
यदि \({\sin ^{ - 1}}\,x + {\cot ^{ - 1}}\left( {\frac{1}{2}} \right) = \frac{\pi }{2}\) है, तो x ___ है।
1
0
2
\(\frac{1}{{\sqrt 5 }}\)
3
\(\frac{2}{{\sqrt 5 }}\)
4
\(\frac{{\sqrt 3 }}{2}\)