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JEE Advanced Mathematics question

MathematicsTrigonometric Ratio and IdentitiesJEE Advanced

is an identity in . Then

Answer: (A),(C),(D)

Solution

, so

x2x=Missing argument for \tfrac\tfrac143x2x+Missing argument for \tfrac\tfrac34 x2x=Missing argument for \tfrac\tfrac18(5x- x)+Missing argument for \tfrac\tfrac38(3x+ x)

=Missing argument for \tfrac\tfrac14 x+Missing argument for \tfrac\tfrac383x+Missing argument for \tfrac\tfrac185x.

So

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Question ID VK-108522