求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 08:43:05
求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?
x){I838#m405,"%X {m)4AΆ013UxɎ]z=d'%?~qAbV;#pn

求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?
求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?

求(sin1°)^2+(sin2°)^2+(sin3°)^2+……+(sin89°)^2的值?
44.5 把前一半换成余角cos即可