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Let’s check out your problem:
Convert the polar equation
\newline
r
=
5
2
sin
θ
−
3
cos
θ
r=\frac{5}{2\sin \theta-3\cos \theta}
r
=
2
s
i
n
θ
−
3
c
o
s
θ
5
to rectangular form.
View step-by-step help
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Math Problems
Precalculus
Convert complex numbers between rectangular and polar form
Full solution
Q.
Convert the polar equation
\newline
r
=
5
2
sin
θ
−
3
cos
θ
r=\frac{5}{2\sin \theta-3\cos \theta}
r
=
2
s
i
n
θ
−
3
c
o
s
θ
5
to rectangular form.
Remember Trig Identities:
We have:
r
=
5
2
sin
θ
−
3
cos
θ
r = \frac{5}{2\sin \theta - 3\cos \theta}
r
=
2
s
i
n
θ
−
3
c
o
s
θ
5
. First, let's remember that
sin
θ
=
y
r
\sin \theta = \frac{y}{r}
sin
θ
=
r
y
and
cos
θ
=
x
r
\cos \theta = \frac{x}{r}
cos
θ
=
r
x
.
Substitute Trig Identities:
Substitute
sin
θ
\sin \theta
sin
θ
and
cos
θ
\cos \theta
cos
θ
in the equation:
r
=
5
2
(
y
r
)
−
3
(
x
r
)
.
r = \frac{5}{2(\frac{y}{r}) - 3(\frac{x}{r})}.
r
=
2
(
r
y
)
−
3
(
r
x
)
5
.
Simplify Equation:
Simplify the equation:
r
=
5
r
2
y
−
3
x
r = \frac{5r}{2y - 3x}
r
=
2
y
−
3
x
5
r
.
Eliminate Fraction:
Multiply both sides by
(
2
y
−
3
x
)
(2y - 3x)
(
2
y
−
3
x
)
to get rid of the
fraction
:
r
(
2
y
−
3
x
)
=
5
r
r(2y - 3x) = 5r
r
(
2
y
−
3
x
)
=
5
r
.
Use Polar Coordinates:
Remember that
r
2
=
x
2
+
y
2
r^2 = x^2 + y^2
r
2
=
x
2
+
y
2
. But we need to use
r
r
r
correctly in our equation.
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\newline
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