Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Trigonometry Inverse Trigonometric Functions

\(\rm cot^{-1}\left(-\frac{1}{\sqrt 3}\right)\) का मुख्य मान है: 

1
π/3
2
-π/6
3
1/√3
4
2π/3
5
उपर्युक्त में से कोई नहीं
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