A \(\cos \alpha = \frac{{\sqrt 5 }}{3};\,\,\tan \alpha = – \frac{2}{3};\,\,\cot \alpha = – \frac{{\sqrt 5 }}{2}\) B \(\cos \alpha = \frac{{\sqrt 5 }}{3};\,\,\tan \alpha = \frac{{2\sqrt 5 }}{5};\,\,\cot \alpha = \frac{{\sqrt 5 }}{2}\) C \(\cos \alpha = \frac{{\sqrt 2 }}{3};\,\,\tan \alpha = \sqrt 2 ;\,\,\cot \alpha = \frac{1}{2}\) D \(\cos \alpha = \frac{1}{3};\,\,\tan \alpha = 2;\,\,\cot \alpha = \frac{1}{2}\)

A \(\cos \alpha = \frac{{\sqrt 5 }}{3};\,\,\tan \alpha = – \frac{2}{3};\,\,\cot \alpha = – \frac{{\sqrt 5 }}{2}\)

B \(\cos \alpha = \frac{{\sqrt 5 }}{3};\,\,\tan \alpha = \frac{{2\sqrt 5 }}{5};\,\,\cot \alpha = \frac{{\sqrt 5 }}{2}\)

C \(\cos \alpha = \frac{{\sqrt 2 }}{3};\,\,\tan \alpha = \sqrt 2 ;\,\,\cot \alpha = \frac{1}{2}\)

D \(\cos \alpha = \frac{1}{3};\,\,\tan \alpha = 2;\,\,\cot \alpha = \frac{1}{2}\)

Hướng dẫn Chọn đáp án là: B

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