Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Trigonometry Inverse Trigonometric Functions
What is the principal value of \(cosec ^{-1}(-\sqrt2)?\)
1
\(\frac{\pi}{4}\)
2
\(\frac{\pi}{2}\)
3
\(-\frac{\pi}{4}\)
4
More than one of the above
5
None of the above