Question

How to use sinh() function to get the hyperbolic sine of an angle of N radians in PHP

Answer 1

echo "sinh(PI / 6) = " . sinh(M_PI / 6) . "<br />";
echo "sinh(PI / 2) = " . sinh(M_PI / 2) . "<br />";
echo "sinh(PI / 180) = " . sinh(M_PI / 180) . "<br />";
echo "sinh(-2 * PI / 4) = " . sinh(-2 * M_PI / 4) . "<br />";
echo "sinh(+0) = " . sinh(0.0) . "<br />";
echo "sinh(-0) = " . sinh(-0.0) . "<br />";
echo "sinh(+1) = " . sinh(1.0) . "<br />";
echo "sinh(-1) = " . sinh(-1.0) . "<br />";
echo "sinh(log(2.0)) = " . sinh(log(2.0)) . "<br />";



/*
run:
    
sinh(PI / 6) = 0.54785347388804
sinh(PI / 2) = 2.3012989023073
sinh(PI / 180) = 0.017454178629595
sinh(-2 * PI / 4) = -2.3012989023073
sinh(+0) = 0
sinh(-0) = 0
sinh(+1) = 1.1752011936438
sinh(-1) = -1.1752011936438
sinh(log(2.0)) = 0.75
      
*/

 

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