(1/sin10度)-(根3/sin80度)的值为?
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(1/sin10度)-(根3/sin80度)的值为?
(1/sin10度)-(根3/sin80度)的值为?
(1/sin10度)-(根3/sin80度)的值为?
原式=1/sin10-√3/cos10
=(cos10-√3sin10)/sin10cos10
=2(1/2cos10-√3/2*sin10)/sin10cos10
=2cos(10+60)/sin10cos10
=4cos70/sin20
=4
(1/sin10度)-(根3/sin80度)的值为?
1/sin10度—根号3/sin80度.怎么算
求(1/sin10度)-(根号3/sin80度)的值
1/sin10度 - 3的根号/sin80度=?
1/sin10°-√3/sin80°
[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80度)
求【2sin50度+sin10度(1+根号3tan10度)】sin80度的值
(1/sin10度)—(根号3/sin80度)=
1/sin10°-根号3/sin80°的值为
1/sin10°-根号3/sin80°的值为
求值:1/sin10°-根号3/sin80°
1/sin10°-根号3/sin80°=
[2sin50+sin10(1+根号3tan10)]sin80
求值:1/sin10°-√3/sin80°
1/sin10°— √3/sin80°
[2sin50+sin10(1+根号3*tan10)]*根号(2sin80*sin80)
求值[2sin50°+sin10°(1+√3tan10°)]*√2(sin80°)*(sin80°)
求[2sin50°+sin10°(1+√3tan10°0]sin80°的值