Writing Equations Using Trigonometric Ratios Triangle A B C is shown. Angle A C B is a right angle and angle C A B is 45 degrees. The length of hypotenuse A B is 9.

Which equations could be used to solve for the unknown lengths of △ABC? Check all that apply.

sin(45°) = StartFraction B C Over 9 EndFraction
sin(45°) = StartFraction 9 Over B C EndFraction
9 tan(45°) = AC
(AC)sin(45°) = BC
cos(45°) = StartFraction B C Over 9 EndFraction