[1/(cos10°)]-[ (根号3)/(sin80°)]=___
1/sin10°-根号3/sin80°
求值:2sin50°+sin80°(1+3tan10°)1+cos10°
不查表,计算1/sin10°-(根号3)/sin80°=
1/sin10°-根号3/sin80°=
求值:1/sin10°-根号3/sin80°
1/sin10°-根号3/sin80°的值为
1/sin10°-根号3/cos10°=
化简:(cos10°+根号下3sin10°)/根号下(1-cos80°)=
tan70°cos10°【根号3tan20°—1】
化简:1/(sin10°) —根号3/cos10°
求1/sin10°-根号3/cos10°的值.
化简1/sin10°-根号3/cos10°