Question

Ive gotten this far, what next?

Write the vector v in the form ai + bj, given its magnitude ||v|| and the angle α it makes with the positive x-axis. ||v|| = 7, α = 150°


x = r cos θ, y = r sin θ

r=7, θ=150°, x=a and y=b.

v = (7 cos 150°)i + (7 sin 150°)j