高中《物理》第一册(必修)第1 69面下的注释为:“由单摆周期公式算出的周期与实际测定值之间的误差,随着偏角的增大而增大.偏角为5°时误差为0 .0 1 % ,7°时为0 .1 % ,1 5°时为0 .5% ,2 3°时为1 % .”这些测定值是如何得到的?为此,必须弄清单摆周期公式的推导过程和推导条件 In the first book (required) in the first book (required) of the high school “Physics”, the comment under the 1 69th face is: "The error between the period calculated from the single-swing period formula and the actual measured value increases as the declination increases. The error is 0. 0 1 % at 5°, 0.1% at 7°, 0.5% at 1°, and 1% at 2 3°. How are these measured values ​​obtained? The list of periodic equations must be deduced and deduced