(1)计算tan30°·sin²40°+tan30°·sin²50°
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 11:06:34
![(1)计算tan30°·sin²40°+tan30°·sin²50°](/uploads/image/z/1589520-48-0.jpg?t=%281%29%E8%AE%A1%E7%AE%97tan30%C2%B0%C2%B7sin%26%23178%3B40%C2%B0%2Btan30%C2%B0%C2%B7sin%26%23178%3B50%C2%B0)
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(1)计算tan30°·sin²40°+tan30°·sin²50°
(1)计算tan30°·sin²40°+tan30°·sin²50°
(1)计算tan30°·sin²40°+tan30°·sin²50°
原式=tan30(sin40^2+cos40^2)=tan30=√3/3