【文章內(nèi)容簡介】 參數(shù) i我 the value whose absolute value has to be 。 Returns返回 the argument if it is positive, otherwise the negation of the ，否則該參數(shù)的否定。 public static double abs (double d) 公共靜態(tài)d）雙 ABS裝置 （雙 Since: API Level 1因為： 空氣污染水平1 Returns the absolute value of the 。 Special cases:特殊情況： abs() = + abs(+infinity) = +infinity abs(infinity) = +infinity abs(NaN) = NaN Parameters參數(shù) d 240。 the value whose absolute value has to be 。 Returns返回 the absolute value of the 。 public static double acos (double d) 公共靜態(tài)d）雙 阿科斯 （雙 Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the arc cosine of the argument within the range [0..pi] .返回最接近參數(shù)近似余弦雙圓弧的范圍內(nèi)[0..pi] 。 Special cases:特殊情況： acos((anything 1) = NaN acos((anything 1) = NaN acos(NaN) = NaN Parameters參數(shù) d 240。 the value to pute arc cosine 。 Returns返回 the arc cosine of the 。 public static double asin (double d) 公共靜態(tài)雙 阿辛 （雙D） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the arc sine of the argument within the range [pi/2..pi/2] .返回最接近參數(shù)范圍內(nèi)的近似雙圓弧正弦的[pi/2..pi/2] Special cases:特殊情況： asin((anything 1)) = NaN asin((anything 1)) = NaN asin(NaN) = NaN Parameters參數(shù) d 240。 the value whose arc sine has to be 。 Returns返回 the arc sine of the 。 public static double atan (double d) 公共靜態(tài)雙重 的Atan（ 雙D） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the arc tangent of the argument within the range [pi/2..pi/2] .返回最接近參數(shù)范圍內(nèi)的近似雙圓弧切線的[pi/2..pi/2] Special cases:特殊情況： atan(+) = + atan() = atan(+infinity) = +pi/2 atan(infinity) = pi/2 atan(NaN) = NaN Parameters參數(shù) d 240。 the value whose arc tangent has to be ，其必須被計算。 Returns返回 the arc tangent of the 。 public static double atan2 (double y, double x) 公共靜態(tài)雙 atan2的 （雙Y，雙X） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the arc tangent of y/x within the range [pi..pi] .返回最接近的切線近似雙弧y/x范圍內(nèi)[pi..pi] This is the angle of the polar representation of the rectangular coordinates (x,y).這是極坐標表示的矩形角坐標（x，y）的。 Special cases:特殊情況： atan2((anything), NaN ) = NaN。 atan2(NaN , (anything) ) = NaN。 atan2(+, +(anything but NaN)) = + atan2(, +(anything but NaN)) = atan2(+, (anything but NaN)) = +pi atan2(, (anything but NaN)) = pi atan2(+(anything but 0 and NaN), 0) = +pi/2 atan2((anything but 0 and NaN), 0) = pi/2 atan2(+(anything but infinity and NaN), +infinity) = + atan2(+(anything but infinity and NaN), +infinity) = + atan2((anything but infinity and NaN), +infinity) = atan2((anything but infinity and NaN), +infinity) = atan2(+(anything but infinity and NaN), infinity) = +pi atan2((anything but infinity and NaN), infinity) = pi atan2(+infinity, +infinity ) = +pi/4 atan2(infinity, +infinity ) = pi/4 atan2(+infinity, infinity ) = +3pi/4 atan2(infinity, infinity ) = 3pi/4 atan2(+infinity, (anything but,0, NaN, and infinity)) = +pi/2 atan2(+infinity, (anything but,0, NaN, and infinity)) = +pi/2 atan2(infinity, (anything but,0, NaN, and infinity)) = pi/2 atan2(infinity, (anything but,0, NaN, and infinity)) = pi/2 Parameters參數(shù) y ? the numerator of the value whose atan has to be ，其計算的Atan要分子。 x x the denominator of the value whose atan has to be ，其計算的Atan要分母。 Returns返回 the arc tangent of y/x .切弧y/x 。 public static double cbrt (double d) 公共靜態(tài)雙cbrt（雙D） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the cube root of the 。 Special cases:特殊情況： cbrt(+) = + cbrt() = cbrt(+infinity) = +infinity cbrt(infinity) = infinity cbrt(NaN) = NaN Parameters參數(shù) d 240。 the value whose cube root has to be ，必須計算。 Returns返回 the cube root of the 。 public static double ceil (double d) 公共靜態(tài)雙重 性細胞 （雙D） Since: API Level 1因為： 空氣污染水平1 Returns the double conversion of the most negative (closest to negative infinity) integer value which is greater than the （最接近負無窮大）的整數(shù)值，比參數(shù)大。 Special cases:特殊情況： ceil(+) = + ceil() = ceil((anything in range (1,0)) = ceil(+infinity) = +infinity ceil(infinity) = infinity ceil(NaN) = NaN Parameters參數(shù) d 240。 the value whose closest integer value has to be ，其值必須被計算。 Returns返回 the ceiling of the 。 public static double cos (double d) 公共靜態(tài)d）雙 余弦 （雙 Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the cosine of the 。 Special cases:特殊情況： cos(+infinity) = NaN cos(infinity) = NaN cos(NaN) = NaN Parameters參數(shù) d 240。 the angle whose cosine has to be puted, in ，弧度。 Returns返回 the cosine of the 。 public static double cosh (double d) 公共靜態(tài)雙 雙曲余弦 （雙D） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the hyperbolic cosine of the 。 Special cases:特殊情況： cosh(+infinity) = +infinity cosh(infinity) = +infinity cosh(NaN) = NaN Parameters參數(shù) d 240。 the value whose hyperbolic cosine has to be 。 Returns返回 the hyperbolic cosine of the 。 public static double exp (double d) 公共靜態(tài)雙重 曝光 （雙D） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of the raising e to the power of the “e”來的論點功率雙逼近。 Special cases:特殊情況： exp(+infinity) = +infinity exp(infinity) = + exp(NaN) = NaN Parameters參數(shù) d 240。 the value whose exponential has to be ，其指數(shù)必須被計算。 Returns返回 the exponential of the 。 public static double expm1 (double d) 公共靜態(tài)雙expm1（雙D） Since: API Level 1因為： 空氣污染水平1 Returns the closest double approximation of e d 1 .返回最接近的雙重逼近e d 1 。 If the argument is very close to 0, it is much more accurate to use expm1(d)+1 than exp(d) (due to cancellation of significant digits).如果參數(shù)是非常接近0，它更準確的使用expm1(d)+1比exp(d) （由于數(shù)字取消顯著）。 Special cases:特殊情況： expm1(+) = + expm1() = expm1(+infinity) = +infi