Implementation of Spherical Trigonometry Qibla Direction Formula with Modern Calculating Tools

Abstract

The determination of the direction of the Qibla can now be calculated using spherical trigonometry theory. However, in its application there are still shortcomings in the correct placement of quadrants related to the results, such as producing UB, SB, UT, ST, this will make the calculation results of the Qibla azimuth less precise. So this paper will examine the implementation of spherical trigonometry of the Qibla direction formula with modern calculating tools, so that errors in quadrant placement can be avoided. The research method used to complete this paper is a qualitative method literature study. Data sources are taken from books, journals and several articles from electronic media then analyzed using descriptive analysis techniques. The results of this study are the application of the spherical trigonometry formula for the direction of the Qibla can be done with modern calculating tools using the atan2 function which is already available in various programming including Excel. The use of this atan2 function will provide the results of the Qibla direction according to the correct quadrant, so that calculation errors can be minimized.