If , then the value at…

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

Problem

If f(x)=∣sin⁡x−∣cos⁡x∣∣f(x)=|\sin x-|\cos x||, then the value f′′(x)f''(x) at x=7π/6x=7\pi/6 is (a) positive (b) 1−32\frac{1-\sqrt{3}}{2} (c) 0 (d) none of these

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