Teaching EMRS PGT Mock Test 2023 Mathematics Trigonometry Inverse Trigonometric Functions

What is the value of sin-1 {cos (sin-1 x)} + cos-1 {sin (cos-1x)}?

1
2r
2
\(\frac{\pi }{2}\)
3
\(- \frac{\pi }{2}\)
4
2x + π
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