Mathematics of surveying excel spreadsheet programme will help and simplify your everyday maths calculations, including;
 
 
Global local coordinate transformation
Calculation of bearing and distance between two points
Calculation of intersection coordiantes of two lines
Adding and subtractings angles
Converting angles from decimals to degrees, minutes, seconds
Calculation of reduced levels in levelling
Resection programme, calculating position of a point from its distance to two known points
 
Simply download a free spreadsheet app to use this program.