sin18°×cos32°

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/31 01:10:05
sin18°×cos32°sin18°×cos32°sin18°×cos32°sin18°×cos32°=[sin(18°+32°)+sin(18°-32°)]/2=(sin50°-sin14°)/2

sin18°×cos32°
sin18°×cos32°

sin18°×cos32°
sin18°×cos32°
=[sin(18°+32°)+sin(18°-32°)]/2
=(sin50°-sin14°)/2
=(0.766-0.242)/2
=0.524/2
=0.262

约等于0.262

0.309016