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If-f-x-csc-pix-3-sec-pix-6-and-f-a-pi-9-Find-the-value-of-a-




Question Number 175952 by cortano1 last updated on 10/Sep/22
 If f(x)= csc (((πx)/3))+sec (((πx)/6))   and f ′(a)= −(π/9). Find the value  of a.
$$\:\mathrm{If}\:\mathrm{f}\left(\mathrm{x}\right)=\:\mathrm{csc}\:\left(\frac{\pi\mathrm{x}}{\mathrm{3}}\right)+\mathrm{sec}\:\left(\frac{\pi\mathrm{x}}{\mathrm{6}}\right) \\ $$$$\:\mathrm{and}\:\mathrm{f}\:'\left(\mathrm{a}\right)=\:−\frac{\pi}{\mathrm{9}}.\:\mathrm{Find}\:\mathrm{the}\:\mathrm{value} \\ $$$$\mathrm{of}\:\mathrm{a}. \\ $$

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