ATan.htm 1.6 KB

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  6. <body>
  7. <h1>ATan# ( t# )</h1>
  8. <h1>Parameters</h1>
  9. <table>
  10. <tr>
  11. <td>
  12. t = any number. <br />
  13. <br />
  14. It is considered to be the tangent of an angle.
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  16. </tr>
  17. </table>
  18. <h1>Description</h1>
  19. <table>
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  21. <td>
  22. ATan( t ) is an angle which has tangent = t. <br />
  23. It is in the range -90 to +90 degrees. <br />
  24. <br />
  25. See also ATan2 for an extended version with 360 degree range.
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  27. </tr>
  28. </table>
  29. <h1><a href=../2d_examples/ATan.bb>Example</a></h1>
  30. <table>
  31. <tr>
  32. <td>
  33. ; ATan example <br />
  34. <br />
  35. Const width = 640, height = 480 <br />
  36. <br />
  37. Graphics width, height <br />
  38. <br />
  39. <br />
  40. Local T#, AT# ; Tan and ATan <br />
  41. <br />
  42. zero# = 0 <br />
  43. <br />
  44. Print " T ATan( T )" <br />
  45. Print "=======================" <br />
  46. <br />
  47. ; First, an extreme case... <br />
  48. <br />
  49. T# = 1 / zero ; +Infinity <br />
  50. AT = ATan( T ) <br />
  51. Print RSet(T, 10) + RSet( AT, 11) <br />
  52. <br />
  53. ; Now, back to normal usage... <br />
  54. <br />
  55. For n = -10 To 10 <br />
  56. <br />
  57. T = Sgn( n ) * n * n <br />
  58. AT = ATan( T ) <br />
  59. Print RSet(T, 10) + RSet( AT, 11) <br />
  60. <br />
  61. Next <br />
  62. <br />
  63. ; Finally, another extreme case. <br />
  64. <br />
  65. T# = -1 / zero ; -Infinity <br />
  66. AT = ATan( T ) <br />
  67. Print RSet(T, 10) + RSet( AT, 11) <br />
  68. <br />
  69. WaitKey() : End
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  72. </table>
  73. <br>
  74. <a target=_top href=../index.htm>Index</a><br>
  75. <br>
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