1/sin10° +√3/cos10°=
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1/sin10°+√3/cos10°=1/sin10°+√3/cos10°=1/sin10°+√3/cos10°=1/sin10+√3/cos10=(cos10+√3sin10)/sin10cos10
1/sin10° +√3/cos10°=
1/sin10° +√3/cos10°=
1/sin10° +√3/cos10°=
1/sin10+√3/cos10
=(cos10+√3sin10)/sin10cos10
=2(1/2*cos10+√3/2*sin10)/sin10cos10
=2(sin30cos10+cos30sin10)/sin10cos10
=4sin(30+10)/2sin10cos10
=4sin40/sin20
=8sin20cos20/sin20
=8cos20
你没写错吗?中间是不是-号?
7.52
1/sin10° +√3/cos10°=
1、求证:cos40°(cos10°+√3 sin10°)=cos10°
sin10°-√3cos10°
化简1/sin10°-√3/cos10°
化简 1/sin10°-√3/cos10°
化简1/sin10°-√3/cos10°,
求值;1/sin10°-√3/cos10°.
求值.1/sin10°-√3/cos10°
1/sin10°-根号3/cos10°=
求值:1/sin10°-根号3/cos10°=
(1/sin10)-(√3/cos10)
化简:(cos10°+根号下3sin10°)/根号下(1-cos80°)=分子上的那个 应该是 :(cos10°+√3*sin10°)
三角恒等变换 cos10°-√3sin10°/sin10°cos10°
求证:1/sin10°-√3/cos10°=4有详细过程!谢谢
化简1/sin10°-根号3/cos10°
化简:1/(sin10°) —根号3/cos10°
1/sin10°减去根号3/cos10°,求过程.
求1/sin10°-根号3/cos10°的值.