a cliff on the bank of a river is 300m high if the angle of depression if a point on the opposite side of the river is 60° , find the width of the river

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1