计算直线与平面所成的角关键是作面的垂线找射影或�量法直线上�量与平面法�量夹角的余角三余弦公式最小角定理或先运用等积法求点到 Template




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tomski计算直线与平面所成的角关键是作面的垂线找射影或�量法直线上�量与平面法�量夹角的余角三余弦公式最小角定理或先运用等积法求点到 coloring