1/sin10°-2sin70°+sin[arccos(-根号3/2)]
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
化简:(根号1-2sin10°×cos10°)比sin10°-根号1-sin^210°
[2sin50°+sin10°(1+根号3 tan10°)]根号(2sin^2 80°)的值
【2sin50°+sin10°(1+根号3tan10°】*根号2sin²80°=
[2sin50°+sin10°(1+根号3tan10°)]乘sin10°等于?
2 sin10*sin30*sin50*sin70=?
sin10°sin50°-sin50°sin70°-sin70°sin10°=?
化简1−2sin10°cos10°sin10°−1−sin
化简根号下(1-2sin10°cos10°)/[cos10°-根号下(1-sin^2 80°)]
求值,根号下1-2sin10°cos10°/cos10°-根号下1-sin^2100°
化简(2sin50+sin10(1+根号3tan10))根号(2sin^280)
[2sin50+sin10(1+根号3*tan10) ]根号(sin^280)