- #1
Wi_N
- 119
- 8
- Homework Statement
- 1. first a quarter rotation on the x-axis. 2. then being mirrored on xy-plane. 3. Then projected on the plane x+ 2y+ 3z= 0.
- Relevant Equations
- $$\begin{pmatrix}
1 & 0 & 0 \\
0 & cos(\theta) & -sin(\theta) \\
0& sin(\theta) & cos(\theta)
\end{pmatrix}$$
for rotating on the x-axis.
vector=(abc)
1.
$$\begin{pmatrix}
1 & 0 & 0 \\
0 & cos(\theta) & -sin(\theta) \\
0& sin(\theta) & cos(\theta)
\end{pmatrix}$$
The rotation part is correct.
2.
$$\begin{pmatrix}
1 & 0 & 0 \\
0 & 1 & 0 \\
0& 0 & 0
\end{pmatrix}$$ is wrong apparently
how do I do the mirroring?
step 3 i can do just fine.
1.
$$\begin{pmatrix}
1 & 0 & 0 \\
0 & cos(\theta) & -sin(\theta) \\
0& sin(\theta) & cos(\theta)
\end{pmatrix}$$
The rotation part is correct.
2.
$$\begin{pmatrix}
1 & 0 & 0 \\
0 & 1 & 0 \\
0& 0 & 0
\end{pmatrix}$$ is wrong apparently
how do I do the mirroring?
step 3 i can do just fine.
