trig
posted by TAYLOR .
a vector has a magnitude of 16 and direction of 120 degrees. write the vector in terms of unit vecotrs i and j.

16 cos 120 i + 16 sin 120 j
cos 120 = .5
sin 120 = +.866 or (1/2)sqrt 3
so
8 i + 8 sqrt 3 j
SKETCH it on a GRAPH !!!!