# trig

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

• trig -

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 !!!!

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