math.php  just calls example
  php source code
    $a = 1.0;
    $b = 2.0;
    $c = sin($a);
    echo ("sin($a) = $c 
\n");

  abs(-3) = 3 

min(1,2) = 1 

max(1,2) = 2 

sqrt(2) = 1.4142135623731 

exp(2) = 7.3890560989307 

log(2) = 0.69314718055995 

log10(2) = 0.30102999566398 

sin(1) = 0.8414709848079 

cos(1) = 0.54030230586814 

tan(1) = 1.5574077246549 

asin(1) = 1.5707963267949 

acos(1) = 0 

atan(1) = 0.78539816339745 

sinh(1) = 1.1752011936438 

cosh(1) = 1.5430806348152 

tanh(1) = 0.76159415595576 

asinh(2) = 0.88137358701954 

acosh(2) = 1.3169578969248 

atanh(1) = INF 

atanh(2) = NAN 

atanh(0.1) = 0.10033534773108