How do you convert #(8, 5pi/4)# to rectangular form? Trigonometry The Polar System Converting Between Systems 1 Answer ali ergin Apr 17, 2016 #x=-5,66# #y=-5,66# Explanation: #P=(8,5pi/4)# #P=(x,y)" rectangular form"# #r=8# #x=8*cos (5pi/4)# #x=-5,66# #y=8*sin(5pi/4)# #y=-5,66# Answer link Related questions How do you convert rectangular coordinates to polar coordinates? When is it easier to use the polar form of an equation or a rectangular form of an equation? How do you write #r = 4 \cos \theta # into rectangular form? What is the rectangular form of #r = 3 \csc \theta #? What is the polar form of # x^2 + y^2 = 2x#? How do you convert #r \sin^2 \theta =3 \cos \theta# into rectangular form? How do you convert from 300 degrees to radians? How do you convert the polar equation #10 sin(θ)# to the rectangular form? How do you convert the rectangular equation to polar form x=4? How do you find the cartesian graph of #r cos(θ) = 9#? See all questions in Converting Between Systems Impact of this question 3348 views around the world You can reuse this answer Creative Commons License