The two vectors $\vec a$ and $\vec b$ in the figure below have equal magnitudes of 14.9 m and their angles are $θ_1 = 30°$ and $θ_2 = 114°$.
I've tried:
cos30 times 14.9, sin30 times 14.9, then cos114 times 14.9, sin114 times 14.9.
That yielded 12.9i+7.45j, -6.06i + 13.61j.
I tried adding I and J, but it's not working. I don't understand why.