(tan10°-根号3)*(sin80°/cos40°
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(tan10°-根号3)*(sin80°/cos40°(tan10°-根号3)*(sin80°/cos40°(tan10°-根号3)*(sin80°/cos40°(tan10°-√3)*(sin80°
(tan10°-根号3)*(sin80°/cos40°
(tan10°-根号3)*(sin80°/cos40°
(tan10°-根号3)*(sin80°/cos40°
(tan10°-√3)*(sin80°/cos40°)
=(tan10°-√3)*(sin80°/cos40°)
=(sin80/cos40)(cot80-√3)
=(sin80/cos40)*(cos80/sin80)-(sin80/cos40)*√3
=cos80/cos40-√3sin80/cos40
=-(√3sin80-cos80)/cos40
=-2(√3/2*sin80-1/2*cos80)/cos40
=-2(sin80cos30-cos80sin30)/cos40
=-2sin(80-30)/cos40
=-2sin50/cos40
=-2sin(90-40)/cos40
=-2cos40/cos40
=-2
(tan10°-根号3)*(sin80°/cos40°
化简【2sin50°+sin10°(1+根号3tan10°)】乘根号下2(sin80°的平方)
请问这个题怎么解?sin50°+sin10°(1+根号3*tan10°)根号下2*sin80°平方
一道必修四数学题2sin50°+sin80°(1+根号3 tan10°)-----------------------------根号1+cos10°求值题.
[2sin50+sin10(1+根号3tan10)]sin80
[2sin50+sin10(1+根号3*tan10)]*根号(2sin80*sin80)
化简 (1) (tan10°-根号3)*sin80°/cos40°(2)(根号3-tan18°)/(1+根号3 tan18°)
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80度)
〔2sin50°+sin10°(1+根号3再乘tan10°)〕*根号下2*sin80°的平方〕
求值:[2sin50°+sin80°(1+(√3)tan10°)]∕√(1+cos10°)√是根号
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值
求值:[2sin50°+sin10°(1+√3tan10°)]×√2sin80°
化简【2sin50°+sin80°(1+√3tan10°)】/cos5°
求值:[2sin50°+sin80°(1+√3tan10°)]/√2cos5°
[2sin50+sin80(1+根号3*tan10)]/根号(1+cos10)急!
{2sin50+sin80[1+(根号)3tan10]}/根号(1+cos10)的值
求值【2sin50+sin10(1+根号3*tan10)]*根号下2*sin80,