TRIGONOMETRY- BASE OF MATHEMATICS
TRIGONOMETRY- BASE OF MATHEMATICS Trigonometry, The most useful topic in mathematics and others. The journey starts in 300BC when Euclid, The Father of Geometry who published his 13-volume book on geometry named Euclidean Geometry. BOOK 1 Definition : (2) A line is a length without breadth. (8) A plane angle is the inclination of the lines to one another, when two lines in a plane meet one another and are not lying in a straight line. (10) When a straight-line stood upon(another) straight-line makes adjacent angles (which are) equal to one another, each of the equal angles is a right-angle, and The former straight-line is called a perpendicular to that upon with it stands. (12) An acute angle (is) one less than a righ t