cos45°sin²30°+2分之根号2sin²60°
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/03 12:16:40
cos45°sin²30°+2分之根号2sin²60°
cos45°sin²30°+2分之根号2sin²60°
cos45°sin²30°+2分之根号2sin²60°
cos45°sin²30°+2分之根号2sin²60°
=√2/2×1/4+√2/2 ×3/4
=√2/2×(1/4+3/4)
=√2/2×1
=√2/2
原式=√2/2×1/4+√2×3/4/2
=√2/8+3√3/8
=√3/2.