求1/sin10°-根号3/cos10°的值(要过程)
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/21 01:38:20
求1/sin10°-根号3/cos10°的值(要过程)
1/sin10°-(根号3)/cos10°
=(cos10°-(根号3)sin10°)/(sin10°×cos10°)
=2(1/2 cos10°- (根号3)/2 sin10°))/(sin10°×cos10°
=2(sin30°cos10°-cos30°sin10°)/(sin10°×cos10°)
=2sin20°/(sin10°×cos10°)
=4sin20°/(2sin10°×cos10°)
=4sin20°/sin20°
=4
=(cos10°-(根号3)sin10°)/(sin10°×cos10°)
=2(1/2 cos10°- (根号3)/2 sin10°))/(sin10°×cos10°
=2(sin30°cos10°-cos30°sin10°)/(sin10°×cos10°)
=2sin20°/(sin10°×cos10°)
=4sin20°/(2sin10°×cos10°)
=4sin20°/sin20°
=4
求1/sin10°-根号3/cos10°的值(要过程)
求1/sin10°-根号3/cos10°的值.
化简sin10°-根号3*cos10°
化简:1/(sin10°) —根号3/cos10°
1/sin10°-根号3/cos10°=
化简1/sin10°-根号3/cos10°
化简:根号(1+2sin10°cos10°)
化简:(cos10°+根号下3sin10°)/根号下(1-cos80°)=
tan70°(cos10°+根号3sin10°)-2cos40°的值
〔cos40°(cos10°+根号3sin10°)〕/ (2cos^25°-1)
求化简(1)sin10°分之1减去cos10°分之根号3,
化简:(根号1-2sin10°×cos10°)比sin10°-根号1-sin^210°