The trigonometric functions have been defined using the unit circle.
The sin(θ) is the vertical component , the cos(θ) is the horizontal coordinate of the arc endpoint.
Sin(q) = Opposite / Hypotenuse
Cos(q) = Adjacent / Hypotenuse
Tan(q) = Opposite / Adjacent
The table for basic trigonometric numbers of the most common angles as follows:
|0o||0||1||0||Not define||1||Not define|
|90o||1||0||Not define||0||Not define||1|
Difference between radian (RED) and degrees (DEG)
A radian is equal to 180 degrees because a whole circle is 360 degrees and is equal to two pi radians. A radian is not as widely used in the measurement of circles and angles as a degree because it involves the knowledge of higher mathematics and includes tangents, sine, and cosines. A sin(θ) is the vertical component and cos(θ) is the horizontal coordinate of the arc endpoint.