For \( \theta \in R \), the line \( y=(x-11) \cos \theta-\cos 3 \theta \) is always normal to th... VIDEO
For \( \theta \in R \), the line \( y=(x-11) \cos \theta-\cos 3 \theta \) is always normal to the parabolahttps://bit.ly/YTAI_PWAP https://www.pw.live
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\[
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\[
\begin{array}{l}
\frac{1^{2}}{3}{ }^{n} C_{1}+\frac{1^{2}+2^{2}}{5}{ }^{n} C_{2}+\...
0