Question

If

A = B + C

, and the magnitudes of

A, B, C

are 5, 4, and

3 units, then the angle between

A and C is

a)

 

1

cos 3 / 5 

b) cos‒1 (4/5)

c) sin‒1 (3/4) d)

 /2​

Answer 1

hi

your

answer

is

b)

cos-1 (4/5)