state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Mathematics Trigonometry Inverse Trigonometric Functions
यदि sin-1 \(x = \frac{\pi }{5}\) कुछ x ϵ (-1, 1) के लिए, तब cos-1 x का मान है:
1
\(\frac{{3\pi }}{{10}}\)
2
\(\frac{{5\pi }}{{10}}\)
3
\(\frac{{7\pi }}{{10}}\)
4
\(\frac{{9\pi }}{{10}}\)
5
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