Question

if the magnitude of two vectors vector A vector B and vector c are respectively 3, 4and 5 units and vector A + vector b is equal to vector C then the angle between vector a and vector b is

Answer 1

Answer:

Then the angle between both the vectors is 0°....

Answer 2

Answer:

90 degree

Explanation:

a+b=c

or, (a+b)^2=c^2

or,a^2+b^2+2ab cos(x)=c^2. [let the angle between vector a and vector b is x]

or, 9+16+24cos(x)=25

or,cos(x)=0

or,x=π/2