sin10°cos35°+cos10°cos55°=

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°