进Two vectors a and b have the components,in meters a（x）=3.2 a（y）=1.6 b（x）=0.50 b（y）=4.5 1.find the angle between the directions of a and b.There are two vectors in the xy plane that are perpendicular to a and have a magnitude of 5.0

进Two vectors a and b have the components,in meters a（x）=3.2 a（y）=1.6 b（x）=0.50 b（y）=4.5 1.find the angle between the directions of a and b.There are two vectors in the xy plane that are perpendicular to a and have a magnitude of 5.0
进
Two vectors a and b have the components,in meters
a（x）=3.2 a（y）=1.6 b（x）=0.50 b（y）=4.5
1.find the angle between the directions of a and b.
There are two vectors in the xy plane that are
perpendicular to a and have a magnitude of 5.0m.One,
vector c,has a positive x component and the other,
vector d,a negative x component.What are 2.the x
component and 3.the y component of c,and 4.the x
component and 5.the y component of vector
我看不太懂 =

进Two vectors a and b have the components,in meters a（x）=3.2 a（y）=1.6 b（x）=0.50 b（y）=4.5 1.find the angle between the directions of a and b.There are two vectors in the xy plane that are perpendicular to a and have a magnitude of 5.0
a和b 2个向量 单位是米
a(x)=3.2 a(y)=1.6 b(x)=0.50 b(y)=4.5
1 找出a和b之间的尖角（求角度）
xy平面上有2个5米的向量与a垂直.向量c为X正方向
向量d为X负方向 2个单位X向量+3个单位向量Y=多少个C
4个单位向量X+5个单位向量Y=多少个D