Continuity and DifferentiabilityHard

Question

If f(x) = tan x + sec2 x, then f′ (x) equals-

Options

A.sec x (1+ tan x)
B.sec x (1 + 2 tan x)
C.sec2 x (1 + tan x)
D.sec2 x (1 + 2 tanx)

Solution

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