Question 709119
find the exact value of each expression 
21) cot [inverse sin negative root 2 over 3]
Inverse sin(-&#8730;2/3) means you are working with a right triangle where:
opposite side=-&#8730;2
hypotenuse=3
therefore, adjacent side=&#8730;(3^2-(&#8730;2)^2)=&#8730;(9-2)=&#8730;7
cot=adjacent side/opposite side=-&#8730;(2/7)