Anyone here that can help me find out (A->C) and (B->C) here?

This is a 30 - 60 - 90   right triangle

The sides are in the ratio ... 1, sqrt(3), 2       where the shortest side is opposite the smallest angle, the next shortest side is opposite the second largest angle, and the hypotenuse is opposite the 90 degree angle....so we have.....   

AC = sqrt(3)* 9  = about  15.588 m

BC = 2 * 9  = 18  m

AC=9*tan(60)

_{( tan(60) = AC/9 )}

BC=9/cos(60)

_{( cos(60) = 9/BC )}