Which of the following equals ?

MATHEMATICS · Single correct · AP · Calculus AB · Differentiation: Definition and Fundamental Properties · Differentiation: Definition and Fundamental Properties

Problem

Which of the following equals ddx(sec⁡x)\dfrac{d}{dx}\bigl(\sec x\bigr) ? (a) −sec⁡xtan⁡x-\sec x\tan x (b) tan⁡x\tan x (c) sec⁡xtan⁡x\sec x\tan x (d) sec⁡2x\sec^{2}x

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