Trigonometric Special Angles

Which of the following are the trigonometric special angles?

• $45^{\degree},\ 20^{\degree},\ 0^{\degree},\ 90^{\degree},\ 60^{\degree}$

• $50^{\degree},\ 20^{\degree},\ 0^{\degree},\ 80^{\degree},\ 60^{\degree}$

• $\ 0^{\degree},\ 90^{\degree},\ 60^{\degree},\ 35^{\degree},\ 45^{\degree}$

• $\ 0^{\degree},\ 90^{\degree},\ 60^{\degree},\ 30^{\degree},\ 45^{\degree}$

 $\sin45^{\degree}=?$  

• 1

•  $\frac{1}{2}$  

•  $\frac{1}{\sqrt{3}}$  

•  $\frac{1}{\sqrt{2}}$  

 $\cos45^{\degree}=?$  

• 1

•  $\frac{1}{\sqrt{2}}$  

•  $\frac{1}{\sqrt{3}}$  

• 0

 $\tan45^{\degree}=?$  

• 1

•  $\frac{1}{\sqrt{2}}$  

•  $\sqrt{2}$  

• 0

 $\sin30^{\degree}=?$  

•  $\frac{1}{\sqrt{2}}$  

•  $\frac{2}{\sqrt{3}}$  

•  $\frac{\sqrt{3}}{2}$  

•  $\frac{1}{2}$  
  

 $\cos30^{\degree}=?$  

•  $\frac{\sqrt{3}}{2}$  

•  $\frac{2}{\sqrt{3}}$  

• 1

• 0

 $\tan30^{\degree}=?$  

•  $\frac{1}{\sqrt{3}}$  

•  $\sqrt{3}$  

•  $\frac{\sqrt{3}}{2}$  

•  $1$  

 $\sin60^{\degree}=?$  

•  $\frac{\sqrt{3}}{2}$  

•  $\frac{1}{2}$  

•  $\frac{2}{\sqrt{3}}$  

•  $0$  

 $\cos60^{\degree}=?$  

•  $\frac{1}{\sqrt{3}}$  

•  $\frac{2}{\sqrt{3}}$  

•  $\frac{1}{2}$  

•  $\sqrt{3}$  

 $\tan60^{\degree}=?$  

•  $\sqrt{2}$  

•  $1$  

•  $\sqrt{3}$  

•  $0$