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## Homework Statement

Let A= 3i - 6j and B= 4i - 5j. The direction of the vector C = A - B is at an angle of?

## Homework Equations

Magnitude= ( a^2 + b^2 ) ^1/2

Tan^-1 = b/a

## The Attempt at a Solution

A-B =

3-4 i -6--5j

-1i -1j

Tan^-1 = -1/-1 = 45

45+180 = 225

Is this correct?