Question

Biết sin a = √3\2. Tính cos a, tan a, cot a

Answer 1

\(\sin a=\frac{\sqrt{3}}{2}\Rightarrow\widehat{a}=60^0\)

\(\Rightarrow\cos a=\cos60^0=\frac{1}{2}\)

    \(\tan a=\tan60^0=\sqrt{3}\)

     \(\cot a=\frac{1}{\tan a}=\frac{1}{\sqrt{3}}=\frac{\sqrt{3}}{3}\)

Answer 2

Trả lời : 

sin a=√3/2 ⇒â=60°

⇒cos a=cos 60° =1/2 

    tan a=tan 60°=√3

     cot a=1/tan a =1/√3 =√3/3