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Mathematics
Mathematics
Problem
If
x
a
cos
θ
+
y
b
sin
θ
=
1
\frac{x}{a} \cos \theta + \frac{y}{b} \sin \theta = 1
a
x
cos
θ
+
b
y
sin
θ
=
1
,
x
a
sin
θ
−
y
b
cos
θ
=
1
\frac{x}{a} \sin \theta - \frac{y}{b} \cos \theta = 1
a
x
sin
θ
−
b
y
cos
θ
=
1
, then eliminate
θ
\theta
θ
.
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