sin2 A + sin2 B + sin2 C – 4cos A × cos B × cos C = 4 , Prove it.
sin2 A + sin2 B + sin2 C – 4cos A × cos B × cos C = 4 , Prove it.
Partha Sarathi Samanta , 5 Years ago
Grade 11
Trigonometry> sin 2 A + sin 2 B + sin 2 C – 4cos A × co...
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