Question

find the i and j component of v in terms of the magnitude of v ad theta simplifying your answer
(theta is in the second quadrant )

Answer 1

can somebody hlp me please

Answer 2

i = v*cos(180-theta)
j = v*sin(180-theta)

Answer 3

Thanks a lot that's what I got but couldn't simplify it much more

Answer 4

great! It's already simplified. Note that in order to obtain vector components, let's say along the x-axis or i, you have to start at 0 degrees. but since the given angle theta is at the second quadrant, I subtracted 180 to theta to get the angle starting from zero.

with that, we can say that:

i = v*cos(180-theta) = v*cos(alpha)
j = v*sin(180-theta) = v*sin(alpha)