A vector is 4.5 units long at 0.70 radians. Express the vector as ( x, y )T.

A good answer might be:

  1. Draw a sketch.
  2. Calculate x by projecting the length onto the x-axis:
    4.5*cos( 0.70 ) = 3.442
  3. Calculate y by projecting the length onto the y-axis
    4.5*sin( 0.70 ) = 2.899
  4. Check answers against the sketch.

Lost Bugs

 

Now it is time for another story problem.

Lola the Ladybug has a cellular phone. Lola is lost. Lola is located at the point (1, -4). Lulu is located at the point ( -4, 3).


 

QUESTION 10:

Call up Lola and tell her in what direction and for what distance she should walk to reach her friend Lulu.