﻿功能:正切函数

格式:tan(a)

说明:a可以为矩阵(此时对矩阵里的每个元素求正切),也可以为数字(此时对本数字求正切)

例子:
x =
 [ 69.4186357638885  92.1004041992595  26.8114049112477
   85.6649515617941  85.2955676081104  78.6668200412145
   83.8496410212711  12.9909401819999  40.1312348154053 ]
tan(x)//回车后得到如下结果
ans =
 [ 0.313282272545595  1.53777538124836   -9.2346616445579
   1.12001874444522   0.511198171742447   0.127690990217154
  -1.46976928999455   0.452064654932305  -0.85860697259302 ]