sin37°cos83°+cos37°sin83°

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/05 13:11:12
sin37°cos83°+cos37°sin83°

sin37°cos83°+cos37°sin83°
sin37°cos83°+cos37°sin83°

sin37°cos83°+cos37°sin83°
解sin37°cos83°+cos37°sin83°=sin(37°+83°)=sin120°=sin60°=1/2