If f(x) = 3x 2 sin x + tan x, then what is the derivative of f(x)?

Correct Answer is : f'(x) = 6x sin x + 3x2 cos x + sec2 x

f'(x) = 6x sin x + 3 x2 cos x + cot2 x

f'(x) = 6x sin x + 3x2 cos x + sec2 x