Question

Resultant of Vectors A and B is 1 to vector A magnitude of resultant is equal to half magnitude of b Find angle between vector A and vector B

Answer 1

Answer:

If you draw a parallelogram with sides of length A and B but make the diagonal at right angles to A, then you will see what you are after.

The diagonal is the resultant, R.

By Pythagoras:

AA + RR = BB

You cannot calculate the magnitude of A, B or R without knowing the magnitude of the other two.