How do you graph y=1-cosx?

Dec 23, 2015

First, notice that $y = - \cos x + 1$.

Recall the graph of the parent function, $y = \cos x$.

graph{cos(x) [-7.9, 7.9, -3.95, 3.95]}

Since $y = \textcolor{red}{-} \cos x$, reflect the graph over the $x$-axis.

graph{-cos(x) [-7.9, 7.9, -3.95, 3.95]}

Now, shift the graph up by $1$ unit since the full equation is y=-cosxcolor(red)(+1.

graph{-cos(x)+1 [-7.9, 7.9, -3.95, 3.95]}