Question

If A=B+C have scalar magnitudes o 5,4,3 units respectively , then find the between A and C.

Answer 1

Here , triangle OMN is given with vectors A,B and C ae its adjacent sides.

As `costheta=(MN)/(ON)implies theta=cos^(-1)((|C|)/(|A|))=cos^(-1)((3)/(5))`