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--- playground:playground [2023/10/09 09:34] – the "jewel" dkwk_su
+++ playground:playground [2023/10/09 11:53] (current) – \cos \sin dkwk_su
@@ Line 1: / Line 1: @@
+====== PlayGround ======
+\begin{equation}
+   E_c = \frac{1}{2}mv^2
+\end{equation}
+\begin{equation}
+   e^{i\theta} = \cos\theta + i\sin\theta
+\end{equation}
+<code bash>
+#!/bin/bash
+if [ $# -ne 1 ]; then
+  echo "Usage: $0 <executable>"
+  exit 1
+fi
+if [ -x $1 ]; then
+  for i in 1 2 3 4; do
+    scp $1 wolf0$i:$PWD/
+  done
+  exit 0
+else
+  echo "$1 isn't executable"
+  exit 1
+fi
+</code>