Trigonometry Calculator

The trigonometric functions have been defined using the unit circle. The degree of an angle measured counter-clock-wise from the x-axis along an arc of the circle.
The sin(θ) is the vertical component , the cos(θ) is the horizontal coordinate of the arc endpoint and the ratio of sin(θ) / cos(θ) is defined as tan(θ). Since the trigonometric functions are periodic with period 360 degree or say 2 π therefore :
func(θ) = func( 2 π r n + θ) where func is a trigonometric function and n is an integer.
Sin(q) = Opposite / Hypotenuse