change (3,pi/4) in Cartesian form
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Use the conversion formulas to convert from polar coordinates to rectangular coordinates. Substitute in the known values of r=3 and θ=π4 θ = π 4 into the formulas. The exact value of cos(π4) cos ( π 4 ) is √22 . Combine 3 and √22 .
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Tony B
Jul 1, 2016
θ
=
3
π
4
→
P
1
→
(
x
,
y
)
=
(
r
cos
(
3
π
4
)
,
r
sin
(
3
π
4
)
)
Explanation:
Let
(
0
,
0
)
to point
(
x
,
y
)
be
r
Then we have
x
=
r
cos
(
θ
)
;
y
=
r
sin
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