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Trigonometry Functions Definition
Right Triangle Definitions
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
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