Hey! i’ll give brainliest please help!

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

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle