Prove that (cos 7x + cos 5x)/(sin 7x - s...

Prove that (cos 7x + cos 5x)/(sin 7x - sin 5x) = cot x . Prove that (cos7x + cos5x)/(sin7x - sin5x) = cotx . Prove that (cos 4x + cos 3x + cos 2x)/(sin 4x + sin 3x + sin 2x) = cot 3x . Prove that: (cos4x + cos3x + cos2x)/(sin4x + sin3x + sin2x) = cot3x . Trigonometry most important questions. Trigonometric functions. #class11 #trigonometricfunctions

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