Please help and thanks

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

Mike wants to make meatloaf. his recipe uses a total of 8 pounds of meat. if he uses a 3 to 1 ratio of beef to pork, how much pork will he use? enter your answer as a mixed number in simplest terms.