Total trigonometry is based on right triangle.The six basic formulas of trigonometry is expressed with the help of right triangle and they can be shown as:
Sinθ = Opposite side of an angle θ {perpendicular(p)} / hypotenuse(h)
Cosθ = Adjacent side of an angleθ{base(b)} / hypotenuse(h)
Tanθ = Opposite side of an angle θ {perpendicular(p)} / Adjacent side of an angleθ{base(b)}
Cosecθ = hypotenuse(h) / Opposite side of an angle θ {perpendicular(p)}
Secθ = hypotenuse(h) / Adjacent side of an angleθ{base(b)}
Cotθ = Adjacent side of an angleθ{base(b)}
/ Opposite side of an angle θ {perpendicular(p)}