1.

The radian measure of an angle of –260° is(A) \((\frac{-13\pi}{12})^c\)(B) \((\frac{-13\pi}{9})^c\)(C) \((\frac{-12\pi}{9})^c\)(D) \((\frac{-26\pi}{9})^c\)

Answer»

(B) \((\frac{-13\pi}{9})^c\) 

-260° = \((-260\times\frac{\pi}{180})^c\) 

\(\frac{-13\pi}{9}^c\)



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