Find the magnitude and direction angle of the vector v.

Question

v = 9i − 9j

Answer 1

Does this help?

Use the Pythagorean theorem to find the magnitude. Use tan^-1 and the appropriate quadrant to find the angle

Answer 2

magnitude = 9sqr2 = about 9(1.414)= about 12.6126 = about 13 rounded to nearest integer

direction = -45 degrees or - pi/4 radians = about -3.1416/4 = about -0.7864 radians