Mathematics

Mathematics

Problem

Which of the following is the derivative of y=arccos⁡xy=\arccos x for −1<x<1-1<x<1? a) 11−x2\dfrac{1}{\sqrt{1-x^{2}}} b) 1−x2\sqrt{1-x^{2}} c) −11−x2-\dfrac{1}{\sqrt{1-x^{2}}} d) 11+x2\dfrac{1}{\sqrt{1+x^{2}}}

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