Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Trigonometry Inverse Trigonometric Functions
The principal value of the expression cos–1[cos (–680°)] is
1
\(\frac{2 \pi}{9}\)
2
\(\frac{−2 \pi}{9}\)
3
\(\frac{34 \pi}{9}\)
4
More than one of the above.
5
None of the above