JEE Main 2014 Mathematics question

Mathematics Continuity and Differentiability JEE Main 2014

If the function is continuous at , then k equals

(1)Correct
(2)0
(3)2
(4)

Answer: (1)

Solution

Put , so and the expression becomes . For small h, \cos\cos$ h) ≈ 1 +

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Question ID VK-104693