Matematika A - 2010. ljeto, 2.

A. $\frac{9\pi }{10}\backslash frac\{9\; \backslash pi\}\{10\}$

B. $\frac{10\pi }{9}\backslash frac\{10\; \backslash pi\}\{9\}$

C. $\frac{9\pi }{20}\backslash frac\{9\; \backslash pi\}\{20\}$

D. $\frac{20\pi }{9}\backslash frac\{20\; \backslash pi\}\{9\}$