{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "46844364",
   "metadata": {},
   "source": [
    "# Cos Plot"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a64ddd0e",
   "metadata": {},
   "outputs": [],
   "source": [
    "\"\"\"\n",
    "   Form a cos(theta) plot in range 0 -> 4pi\n",
    "\"\"\"\n",
    "import math\n",
    "import matplotlib.pyplot as plt     # Import the plot package as plt\n",
    "\n",
    "def main():\n",
    "    plot_range = 4.0*math.pi           # Range of plot\n",
    "    plot_points = 100                   # Number of point\n",
    "    increment = plot_range/plot_points   # Increment between points\n",
    "\n",
    "    theta_data = []                    # lists to hold the data\n",
    "    cos_data = []\n",
    "\n",
    "    for i in range(0,plot_points): # polulate the lists with theta, cos(theta)\n",
    "        theta = increment*i            # value of theta\n",
    "        cos = math.cos(theta)\n",
    "        theta_data.append(theta)\n",
    "        cos_data.append(cos)\n",
    "\n",
    "\n",
    "    plt.plot(theta_data,cos_data,\"g\")    # Default plot in green\n",
    "    plt.title(\"Plot of cosine\")          # Add title/lables\n",
    "    plt.xlabel(\"Angle theta\")\n",
    "    plt.ylabel(\"Cos(theta)\")\n",
    "    plt.show()                           # show the actual plot\n",
    "\n",
    "\n",
    "main()\n"
   ]
  }
 ],
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