Vol DI Btb ‘g X= ( % e – InterviewSolution

1.

Vol DI Btb ‘g X= ( % e

Answer»

Given,cot^-1(4/3) = xCot x = 4/3

tan x = 1/cot x = 3/4

We know,cos 2x = (1 - tan^2 x)/ (1 + tan^2 x) = (1 - (3/4)^2)/ (1 + (3/4)^2) = (1 - 9/16)/(1 + 9/16) = (7/16)/(25/16) = 7/25

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