SOLUTION: PLease help to write -5R + 12U in polar form

Question 67787This question is from textbook An Incremental Development
: PLease help to write -5R + 12U in polar form This question is from textbook An Incremental Development

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
write -5R + 12U in polar form
You need to find r and theta.
r=sqrt(5^2+12^2)=13
theta=artcan(12/-5)
=-67.38+180
This is the answer your calculator will give because the
range of arctan is -90 to 90. But, since you have -5 and
+12 as your x y coordinate, theta is in the 2nd quadrant.
So you add 180 degrees to the calculator answer to get:
=112.62 degrees
----------------
Then the polar form is 13(cos112.62 + i sin112.62)
Cheers,
Stan H.
RELATED QUESTIONS
write -5R+3U in polar... (answered by tommyt3rd)

Please help to Write -3R - 7U in polar... (answered by stanbon)

Can you please help with the polar form question: write the complex number in polar... (answered by Murthy)

Can you please help with this equation: Write complex number in polar form:... (answered by stanbon)

Will someone please help me! I do not understand how to get to the polar form! Write the (answered by scott8148)

please help me to... (answered by checkley71)

Please help. I do not understand Write the complex number in rectangular form. 1.)... (answered by Edwin McCravy)

write in polar form:... (answered by fractalier)