Vectors

realed

How do you find the angle of the position vector (5,2,3) makes with the x y and z axis

Reply 1

DFranklin

Use a.b = |a||b| cos t, where t is the angle between a and b.

Reply 2

Kallisto

Entertainment Forum Helper

Original post by realed

How do you find the angle of the position vector (5,2,3) makes with the x y and z axis

Do you have another vector or just this one? if there is another one calculate with the formula for the angle between two vectors (DFranklin showed you).

(edited 9 months ago)

Reply 3

DFranklin

Original post by Kallisto

Do you have another vector or just this one? if there is another one calculate with the formula for the angle between two vectors (DFranklin showed you).

Spoiler

Reply 4

realed

Original post by Kallisto

Do you have another vector or just this one? if there is another one calculate with the formula for the angle between two vectors (DFranklin showed you).

I have just one

Reply 5

realed

Original post by DFranklin

Use a.b = |a||b| cos t, where t is the angle between a and b.

Also what is a and what is b

Reply 6

realed

Original post by Kallisto

Do you have another vector or just this one? if there is another one calculate with the formula for the angle between two vectors (DFranklin showed you).

When I just on YouTube To find a method it was cos-1(5/square root of 38) but I,m very unsure where that came from

Reply 7

davros

Original post by realed

Also what is a and what is b

These are 2 arbitrary vectors whose included angle you're trying to find - what DFranklin gave you was essentially the definition of the dot product for 2 vectors. So in your case, 'a' could be the vector you've quoted and 'b' would be a unit vector along one of the coordinate axes.