Question

if a=4i+6j-3k and b=2i+5j+7k then find the angle between them

Answer 1

Answer:

the angle between a and b is

75.73 degree

Explanation:

at first find the value of a.b

a.b=17

a=√61

b=√78

cosθ= 17/√61×√78

= 75.73 degree

plz tell me if the answer Is wrong