Syntax
tan(number)
Description
The tan() function returns the tangent of the radian argument.
Example
PI = 3.141593
printf(" degrees tan(x) sin(x)/cos(x)\n")
printf(" ------- -------- -------------\n")
i=-10
while ((i += 10) <= 180) {
Radians = i * 2 * PI / 360
if (abs(cosine = cos(Radians)) <= 0.000000) {
printf(" %3d*** tan(x) is undefined for this value\n",i)
} else {
printf(" %3d %8.5f %8.5f\n",i,tan(Radians),sin(Radians) / cosine)
}
}
degrees tan(x) sin(x)/cos(x)
------- -------- -------------
0 0.00000 0.00000
10 0.17633 0.17633
20 0.36397 0.36397
30 0.57735 0.57735
40 0.83910 0.83910
50 1.19175 1.19175
60 1.73205 1.73205
70 2.74748 2.74748
80 5.67129 5.67129
90*** tan(x) is undefined for this value
100 -5.67128 -5.67128
110 -2.74748 -2.74748
120 -1.73205 -1.73205
130 -1.19175 -1.19175
140 -0.83910 -0.83910
150 -0.57735 -0.57735
160 -0.36397 -0.36397
170 -0.17633 -0.17633
180 0.00000 0.00000