Sine is very important in trigonometry, we have used it for such a long time, but what is sine?
The sine of angle is defined as the y-coordinate of the point P (x, y) on the unit circle.
And this is the graph of sine:
Cosine is one of the most important theorem of trigonometry, we have been using it for a long time, so what is cosine?
The cosine of an angle is defined as the x-coordinate of the point P (x, y) on the unit circle.
And this is the graph of cosine:
Tangent is very important and very useful in trigonometry, we use it a lot in calculus.
The tangent of an angle is defined as the ratio of the y-coordinate of a unit circle to its x-coordinate.
And this is the graph of tangent:
For more information, go to the law of sine, the law of cosine and the special formulars and angles of trigonometry.
