state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Mathematics Trigonometry Inverse Trigonometric Functions
If sin-1 \(x = \frac{\pi }{5}\) for some x ϵ (-1, 1), then the value of cos-1 x is
1
\(\frac{{3\pi }}{{10}}\)
2
\(\frac{{5\pi }}{{10}}\)
3
\(\frac{{7\pi }}{{10}}\)
4
\(\frac{{9\pi }}{{10}}\)
5
Question Not Attempted