A general refinement of Jordan-type inequality
In this work, a general form of Jordans inequality:
a general form of jordans inequality lower and upper bounds yang le inequality the spherical bessel functions (sbfs) the sbfs of the first kind j n ( x ) = ? 2 x j n + 1 2 ( x ) j n ( x ) = ? 2 x j n + 1 2 ( x ) j n ( x ) = ? 2 x j n + 1 2 ( x ) j n ( x ) = ? 2 x j n + 1 2 ( x ) a new infinite series for (sinx)/x ( sin x ) / x (sinx)/x ( sin x ) / x (sinx)/x ( sin x ) / x ( sin x ) / x