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JEE Main Mathematics question

MathematicsTrigonometric Ratio and IdentitiesJEE Main

is equal to

Answer: (B)

Solution

Write and , and set , . Then \frac{\cos(u+v)}{\cos(u-v)}\frac{\cos u\cos v-\sin u\sin v}Extra open brace or missing close brace{\cos\cos\sin\sin$

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Question ID VK-007850