I need help solving these please.

Each test is sufficient to prove the symmetry but is not necessary. That is, a polar equation may fail the test but still have the symmetry. For each polar equation, check all symmetries that are guaranteed by only the tests above. r= = 16 cos 20 r = 8+ 3 sin 0 Symmetry: Symmetry: Polar axis O Polar axis O Line 0 = 2 O Line 0 = 2 Pole O Pole None of these symmetries is None of these symmetries is guaranteed by the tests above. guaranteed by the tests above. X 5Find all avivcons of the equation in the interval [0, 2x). tan = 0 Write your answer in radians in terms of . If there is more than one solution, separate them with commas. X JI X 5 ?Suppost V . an airplane ls asked to stay in a holding pattern near an airport. The distance of the plane to the airport Is described by the following. d(r)=139 +69 sin (2%!) In this equation, {I (I) Is the distance of the plane to the airport (In miles), and I Is the time {in minutes} after the plane enters the holding pattern. Durlng the first 9 minutes alter the plane enters the holding pattern, when will the plane be 170 miles from the airport? Do not round any Intermediate computations, and round your ans-(reds) to the nearest hundredth of a minute. (If there is more than one answer; enter additional answers with the "or" button.) I - mminutes