How does trigonometry combine with physics


trigonometry, the mathematical discipline that deals with the relationships of angles and sides in plane and spherical triangles. The main subject of trigonometry are the trigonometric functions (Circular functions) Cosecans, Cosinus, Secans, Sinus, Tangens and Cotangens, which experience their elementary definition in the right triangle for angles between 0 ° and 90 ° and are then finally defined in the unit circle for any angle. Let be the hypotenuse of a right triangle with

and the two catheters with


designated; Opposite the latter like the angles


lie (see Fig. 1). The elementary definitions in the right triangle are then:

The other trigonometric functions result from

The signs for follow from the corresponding generalization, in which the right-angled triangle is placed in a unit circle (see Fig. 2)



in the individual quadrants,