The cosine and sine curves, written: \[y = cos(x)\quad \text{and} \quad y = sin(x)\] Show us how the value of
Remembering the definition of cosine, with a unit circle, the cosine curve \(y=cos(x)\) corresponds to the horizontal coordinate of a point moving around a unit circle.
Looking at the cosine curve \(y=cos(x)\) we can see quite clearly that
Remembering the definition of sine, with a unit circle, the sine curve \(y=sin(x)\) corresponds to the vertical coordinate of a point moving around a unit circle.
Looking at the sine curve \(y=sin(x)\) we can see quite clearly that
To sketch both \(y=cos(x)\) and \(y=sin(x)\) the idea is to plot:
This method is best explained in the tutorial below.