railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
cot(A + B).cot(A - B) = 1 అయితే, cot \(\left( \frac{2A}{3} \right )\) విలువను కనుగొనండి:
1
\( \frac{2}{{\sqrt 3 }}\)
2
\(\sqrt 3 \)
3
\( \frac{1}{{\sqrt 3 }}\)
4
\( \frac{{\sqrt 3 }}{2}\)