$\sin​A\ =\frac{\sqrt{5}}{3}$  

 $\operatorname{cosec}\ A\ =3\sqrt{5}$  

 $\tan\ A\ =\frac{\sqrt{5}}{2}$  

 $\cot\ A\ =\ \frac{2\sqrt{5}}{5}$  

 $\sec​A\ =\ \frac{3}{2}$  

 $\frac{-\sqrt{6}+\sqrt{2}}{4}$  

 $\frac{-\sqrt{2}+\sqrt{6}}{4}$  

 $\frac{\sqrt{2}+\sqrt{6}}{4}$  

 $\frac{4-2\sqrt{3}}{-2}$  

 $-\ 2\ -\sqrt{3}$  

1

2

 $\frac{1}{2}$  

 $-\frac{1}{2}$  

 $\frac{\sqrt{3}}{2}$  

 $\frac{\sqrt{6}-\sqrt{2}}{4}\ และ​\ \frac{\sqrt{6}+\sqrt{2}}{4}$  

 $\frac{\sqrt{6}-\sqrt{2}}{4}\ และ​\ \frac{\sqrt{6}-\sqrt{2}}{4}$  

 $\frac{-\sqrt{6}+\sqrt{2}}{4}\ และ​\ \frac{\sqrt{6}-\sqrt{2}}{4}$  

 $\frac{-\sqrt{6}-\sqrt{2}}{4}\ และ​\ \frac{\sqrt{6}-\sqrt{2}}{4}$  

 $\frac{\sqrt{6}-\sqrt{2}}{4}\ และ​\ \frac{-\sqrt{6}+\sqrt{2}}{4}$  

 $\sin​2A\ =-\ \frac{24}{25}$  

 $\cos2A\ =\ \frac{7}{25}$  

 $\tan\ 2A\ \ =\frac{24}{7}$  

 $\sec​2A\ =-\frac{25}{7}$  

ถูกทุกข้อ

 $-\frac{25}{7}$  

 $-\frac{25}{24}$  

 $\frac{7}{24}$  

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