state gov Bihar Police Constable (सिपाही) Mock Test Series 2025 Quantitative Aptitude Trigonometry

આપેલ સમીકરણને સરળ બનાવો.

\(\frac{cot^3 A - 1}{cot A - 1}\) = ?

1
cosec 2 A - cotA
2
cosec 2 A + cotA
3
cot 2 A + cosecA
4
cot 2 A - cosecA
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