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JEE Advanced Mathematics question

MathematicsTrigonometric Ratio and IdentitiesJEE Advanced

Let and . Then is equal to

Answer: (A)

Solution

Use and :

a=2Missing argument for \frac\frac{A+B}2{Missing argument for \frac\frac{A-B}2-Missing argument for \frac\frac{A+B}2

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Question ID VK-108471