PLEASE HELPIn the proof of the Law of Cosines, the equation c^2=h^2+(b-x)^2was created using the Pythagorean theorem. Which equation is a result of expanding (b-x)^2?A.c^2=h^2+b^2-x^2B.c^2=h^2+b^2-2bx+x^2C. c^2=h^2+b^2+x^2not DTwo construction workers, Tyrone and Diego, are standing 15 yards apart, looking up at a piano hanging between the two men from a crane. Tyrone is staring at the piano with an angle of elevation of 65°, and Diego is looking up with an angle of elevation of 77°. What is the distance between Tyrone and the piano? Round the answer to the nearest tenth.9.0 yd16.1 yd22.1 yd23.7 yd