#30494 [NEW]: sin() seems to give a wrong output if you convert it to radius

From: tom at neighbour dot nl Operating system: Windows XP PHP version: 4.3.9 PHP Bug Type: Math related Bug description: sin() seems to give a wrong output if you convert it to radius Description: ------------ I have used this function to get the angle of B in a triangle. $B = rad2deg( asin(10/14) ); The output seems to be correct giving me around 45 degrees when i use the asin() function. But when i use the sin() function to get the length of side b in a different triangle: rad2deg( SIN(45) ); it should be giving me around 0.7 back but it gives me 48. When i remove the rad2deg() function and use normal radius sin(45) then it gives me the corect answer which is 0.85 Reproduce code: --------------- $B = rad2deg( asin(10/14) ); rad2deg( SIN(45) ); Expected result: ---------------- I expect to see the proper answer which is 0.7 instead of getting 48 Actual result: -------------- As stated above my actual result is 48 -- Edit bug report at http://bugs.php.net/?id=30494&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=30494&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=30494&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=30494&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=30494&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=30494&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=30494&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=30494&r=needscript Try newer version: http://bugs.php.net/fix.php?id=30494&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=30494&r=support Expected behavior: http://bugs.php.net/fix.php?id=30494&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=30494&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=30494&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=30494&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=30494&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=30494&r=dst IIS Stability: http://bugs.php.net/fix.php?id=30494&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=30494&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=30494&r=float MySQL Configuration Error: http://bugs.php.net/fix.php?id=30494&r=mysqlcfg