sin100º=sin(90°+10°)=sin10°
sin²10°+sin²50°+sin10°sin50°求值!
化简1−2sin10°cos10°sin10°−1−sin
sin10°sin50°-sin50°sin70°-sin70°sin10°=?
【2sin50°+sin10°(1+根号3tan10°】*根号2sin²80°=
(3/sin平方40°-1/cos平方140°)×1/2sin10°=16求证
求sin²10°+cos²40°+sin10°cos40°的值
求sin^10°+cos^40°+sin10°cos40°
利用同角关系化简:[sqrt(1-2sin10°cos10°)]/[sin10°-sqrt(1-sin²10°
计算sin²10°+sin²50°+sin10°sin50°的值详细答案
化简:(根号1-2sin10°×cos10°)比sin10°-根号1-sin^210°
sin10°sin30°sin50°sin70°=?
不查表,计算1/sin10°-(根号3)/sin80°=