sin10°cos35°+cos10°cos55°=
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sin10°cos35°+cos10°cos55°=sin10°cos35°+cos10°cos55°=sin10°cos35°+cos10°cos55°=sin10°cos35°+cos10°cos
sin10°cos35°+cos10°cos55°=
sin10°cos35°+cos10°cos55°=
sin10°cos35°+cos10°cos55°=
sin10°cos35°+cos10°cos55°
=sin10°cos35°+cos10°sin35°
=sin（10°+35°）
=sin45°
=√2/2
sin10 cos35+cos10 cos(90-35)
=sin10 cos35+cos10 sin35
=sin(10+35)
=sin45
=根号2/2
sin10°cos35°+cos10°cos55°=
sin10°cos35°+sin80°sin35°=?
计算2sin10°+cos10°+tan20°sin10°
cos20°cos10°+sin10°sin10°
化简sin10°-根号3*cos10°
sin10°-√3cos10°
cos10°+sin10°/cos10°-sin10°等于多少,化简的详细步骤.谢谢
三角恒等变换 cos10°-√3sin10°/sin10°cos10°
sin40°cos10°-cos40°sin10°
cos10°sin40°-sin10°sin50°
sin10°sin40°+sin50°cos10°
2sin50°+2sin10°sin40°/cos10°
(sin10°+cos50°)/(cos10°-sin50°)?
sin10°cos50°+sin50°cos10°
sin10°cos50°+sin50°cos10°
cos70°cos10°+sin70°sin10°的值,
sin20°sin10°-cos10°sin70°等于多少?
sin20°sin10°-cos10°sin70°