In 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^2 b. c^2=h^2+b^2-2bx+x^2 c. c^2=h^2+b^2+x^2 not d two 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 yd 16.1 yd 22.1 yd 23.7 yd