英语数学题，求解答！

① h / x = tan 47°48' = tan 47.8°
② h / (x+64) = tan 36°24' = tan 36.4°
计算h：1/② - 1/①
64 / h = cot 36.4° - cot 47.8°
h = 64 / (cot 36.4° - cot 47.8°)
计算x：①/②
(x+64) / x = tan 47.8° /