A telephone pole casts a shadow 6m long when the angle of elevation of sun is 62°.Determine the
问题描述：
A telephone pole casts a shadow 6m long when the angle of elevation of sun is 62°.Determine the
angle of elevation of the sun when the pole`s shadow is 20m long .correct to one decimal.
答
一个电线杆在太阳下影长为6米,当太阳到达电线杆头顶时其仰角为62°,当太阳照在电线杆上投下的影子长为20米时,其仰角为多少度结果保留一位小数