SinA - Sin SA + SingA - SinIBA COSA...
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SinA - Sin SA + SingA - SinIBA COSA - COSSA-Cosga + COSIBA - LAYA

JEE/Engineering Exams
Maths
Solution
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( sin A-sin 5 A+sin 9 A-sin 13 A ) ( cos A-cos 5 A-cos 9 A ) ( =frac{(sin A-sin (3 A)+(sin 9 A-sin 5 A)}{(cos 13 A+cos A)-(cos 9 A+cos 5 A)} ) ( sin left(-sin ^{2}right)=2 cos frac{c+1}{2} sin frac{c-D}{2} ) ( cos c+cos theta=2 cos frac{c+1}{2} cdot cos frac{(-D)}{2} ) ( =frac{2 cos 7 A sin (-6 A)+2 sin 62 A cos 7 A}{2 cos 7 A cos 6 A-2 cos 7 A cos 2 pi} ) ( =frac{-sin 6 A+sin 2 A}{cos 6 A-cos 2 A} ) ( =frac{x cos 4 A sin (-2 A)}{-x sin 4 A sin 2 A} ) ( =frac{f cos 4 A sin 2 pi}{operatorname{tsin} 4 A sin 2 A} ) ( =frac{cos 4 A}{sin 4 A} ) ( =cot 4 A )
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