Question

vector a makes an angle of 30 degrees and vector b makes an angle of 120

degrees with the x-axis. The magnitude of these vectors are 3 and 4 respectively.

The magnitude of their resultant is​

Answer 1

The angles between vector a and vector b = 120-30 = 90°

R^2 = (vector a)^2 + (vector b)^2

R^2 = 3^2 + 4^2

R =√25 = 5

R = 5

hope it helped you