Question

How do you graph `y=1-cosx`?

Answer 1

First, notice that `y=-cosx+1`.

Recall the graph of the parent function, `y=cosx`.

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

Since `y=color(red)(-)cosx`, 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]}