Question

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

Answer 1

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



/*
run:
    
sin(PI / 6) = 0.5
sin(PI / 2) = 1
sin(PI / 180) = 0.017452406437284
sin(-2 * PI / 4) = -1
sin(+0) = 0
sin(-0) = 0
sin(+1) = 0.8414709848079
sin(-1) = -0.8414709848079
      
*/

 

70+ SQL courses for beginners and professionals