Find the area A of the dining (8,38) (48,38) (8,10) (48,10)

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.