Question

Find the direction angle of the vector v=7(cos135i+sin135j). how would you do this without converting 135 to sqrt2/2?

Answer 1

groovy....let's do this

Answer 2

I'd give this link a shot if you don't understand what I'm saying; I am a little rusty on vector angles:
http://answers.yahoo.com/question/index?qid=20100723122335AAgqZ22


It seems that there are a number of ways to answer this. The simplest, You can pick up your answer directly,
V=[7cos(135),7sin(135)] with 7 being magnitude and 135 being your angle.

What your equation is telling you, is that you have a vector V. This vector has an intensity, or magnitude, of 7...units.
It also is equally distributed in terms of angle, across the x or cosine, and y or sine.