back to math home page

Trigonometry Functions Definition

Right Triangle Definitions
right triangle figure for the definition of the trigonometry functions. trigonometry functions sine cosine tangent definitions trigonometry functions definition
Note:
a is the opposite side of angle x in right triangle ABC
b id the adjacent side of angle x in right triangle ABC
c is the hypotenuse of the right triangle ABC
Value of trigonometry function of special angles
value of special angles of trigonometry functions value of special angles of trigonometry functions trigonometry function formulas
Quadraant of the Trigonometry Functions
in quadrant I, sin a > 0 and cos a > 0
in quadrant II, sin a > 0 and cos a < 0
in quadrant III, sin a < 0 and cos a < 0
in quadrant IV, sin a < 0 and cos a > 0