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 )

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 )

anonymous · Answer

can somebody hlp me please

anonymous · Answer

|dw:1354103141379:dw|

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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. |dw:1354103926633:dw|

with that, we can say that:

i = v*cos(180-theta) = v*cos(alpha)
j = v*sin(180-theta) = v*sin(alpha)