Biết \(\tan \alpha = 2,\) tính \(\cot \alpha \)
A.\(\cot \alpha = \frac{1}{{\sqrt 2 }}\)
B.\(\cot \alpha = - \frac{1}{{\sqrt 2 }}\)
C.\(\cot \alpha = \frac{1}{2}\)
D.\(\cot \alpha = - \frac{1}{2}\)
A.\(\cot \alpha = \frac{1}{{\sqrt 2 }}\)
B.\(\cot \alpha = - \frac{1}{{\sqrt 2 }}\)
C.\(\cot \alpha = \frac{1}{2}\)
D.\(\cot \alpha = - \frac{1}{2}\)
Loga
Hóa Học lớp 12
