Solve sin 7 A - sin A cos 5 A - cos 3 A -

Given, sin 7A+sin Acos 5A cos 3A ⇒2sin(7A+A2)cos(7A A2) 2sin(5A+3A2)sin(5A 3A2) =2sin 4Acos6A2 2sin 4Asin A =cos 3A sin A . ...

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Trigonometric Ratios of Compound Angles

Solve sin 7...

Question

Solve $\frac{sin 7 A + sin A}{cos 5 A - cos 3 A} = ?$

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Solution

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