1/sin10°-根号3/sin80°
= (sin 80 °- 根号3sin 10°)/sin10°sin80°
=2(1/2cos10°-根号3/2sin10°)/1/2sin10°cos10°
=2(sin30°cos10-cos30°-sin10°)/1/2sin20°
=2sin20°/1/2sin20°
=4
1/sin10°-根号3/sin80°=
1个回答
相关问题
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[2sin50+sin10(1+根号3tan10)]sin80
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求值：1/sin10°-根号3/sin80°
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不查表,计算1/sin10°-(根号3)/sin80°=
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sin80°(1＋(√3)tan10°)=cos10(1＋(√3)tan10°) =2(cos10/2+根号3/2sin
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1/sin10°-√3/sin80°=______________
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1/sin10°-√3/sin80°
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【跪求】【求值】(sin50(1+根号（3）*tan10)-cos20)\(根号（2）*cos80*sin10)
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化简根号下(1-2sin10°cos10°)/[cos10°-根号下(1-sin^2 80°)]
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cos10+根号3*sin10/根号下1-cos80的值为