Find the rectangular coordinates of (7, 9/4 π) ?!

precalc hw

1 Answer
May 9, 2018

Rectangular coordinates are (7 sqrt 2)/2, (7 sqrt 2)/2

Explanation:

Polar coordinate is r= 7 , theta = 9/4 pi=(2 pi+pi/4) = pi/4

Rectangular coordinates are (r cos theta, r sin theta) or

(7 cos (pi/4), 7 sin (pi/4)) = 7/sqrt 2 , 7/sqrt 2

= (7 sqrt 2)/2, (7 sqrt 2)/2

Rectangular coordinates are (7 sqrt 2)/2, (7 sqrt 2)/2 [Ans]