CUET and UG exam CUET UG 2025 Mock Test Series Mathematics Trigonometry Properties of Triangles

एक त्रिभुज ABC में, यदि cot\(\frac{A}{2}\) cot\(\frac{B}{2}\) = K, तब K के सभी संभव मान किसमें निहित हैं?

1
(0, 1]
2
[1, ∞ ) 
3
(1, ∞)
4
(0, 1)
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