PLSSS HELP IF YOU TURLY KNOW THISS

Which of the following is the result of expanding

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90