PHP 忒聊 綴豖 ヶ輛 asin (PHP 3, PHP 4) 鏡扴 殿隙 arg 腔毀淏玾硉ㄛ等弇岆說僅﹝ asin() 岆 sin() 腔毀滲杅ㄛ坳腔砩佷岆婓 asin() 毓峓爵腔藩跺硉飲岆 a==sin(asin(a)) ﹝ 's range. See also asinh(), acos() and atan(). 綴豖 れ萸 ヶ輛 acosh 奻珨撰 asinh