求值(2sin80°-cos70°)÷cos20°如题
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/12 05:46:44
x){i
<Ct́@tYE3l j/!GB6Fh AM] Ĉ{O,{:uO{=_i뚧{ntO=4@BuiĆn/yv M
求值:(2sin80°-cos70°)/cos20°
求值(2sin80°-cos70°)÷cos20°如题
化简求值(2sin80`-cos70`)/cos20`
求值:(2cos80°+cos160°)/cos70°
求值:cos20°/(cos70°-2cos10°)
(2cos20°-sin10°)/sin80°化简求值
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
2sin80度-cos70度/cos20度=?
(2sin80º-cos70º)除以cos20º=?
求值2sin20°+2cos20°+cos70°sin10°/sin70°
cos40°cos70°+cos30°cos50°求值
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
求值:[2sin50°+sin80°(1+√3tan10°)]/√2cos5°
求值:sin10°sin50°sin70°sin80°
求值:1/sin10°-根号3/sin80°
化简求值;(1-sin80°)/cos80°
求值:1/sin10°-√3/sin80°
化简求值:sin20° + sin40° - sin80°如何求值?公示和步骤写清楚