Can someone help? ASAP

Answer:
11. [tex]\frac{\sqrt{2} }{2}[/tex]
12. [tex]\sqrt{3}[/tex]
13. [tex]\frac{\sqrt{3} }{2}[/tex]
14. [tex]\frac{\sqrt{3} }{3}[/tex]
15. [tex]\sqrt{2}[/tex]
16. [tex]\frac{2\sqrt{3} }{3}[/tex]
Step-by-step explanation:
Hope this helps