化简 (sin^2(35°)-1/2)/cos10°cos80°
化简:(cos10°+根号下3sin10°)/根号下(1-cos80°)=
数学三角函数1.(cos10°+√3sin10°)/√(1-cos80°)=2.函数f(x)=√3cos2/5x+sin
数学函数化简(1)cos10° 除以cos80°(2)根号1-cos平方310°(3)(cosA除以1+sinA )+(
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1−2sin10°cos10°sin10°−1−sin
化简1−2sin10°cos10°sin170°−1−sin
不查表求cos80°cos35°+cos10°cos55°的值.
化简:(根号1-2sin10°×cos10°)比sin10°-根号1-sin^210°
化简:根号(1+2sin10°cos10°)
化简(tan10°-根号3)*(cos10°/sin50°)*(2cos10°-sin20°/cos20°)
2sin50°+cos10°(1+3tan10°)1+cos10°