向量问题已知向量a,b夹角为3π/4,a的模为2^(0.5),b
2007-08-09 09:57:20i***
已知向量a,b夹角为3π/4,a的模为2^(0.5),b的模为3,求向量a-b的模向量问题已知向量a,b夹角为3π/4,a的模为2^(0.5),b的模为3,求向量a-b的模:a-b的模的平方 =a^+b^ -2abcosC
a =2^(0?
最佳回答
2007-08-09 16:31:45
2007-08-09 10:06:04
很赞哦! (7)