If ^ -1 ( 1 2 )+ ^ -1 ( x 3 )= 4 , where 0<x<6, then what is x equal to?

NDA 2022 Mathematics question

If , where , then what is equal to?

Answer: (A)

Taking the tangent of both sides: $ = 1 ⇒ 12+ x3 =

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Question ID VK-029327