00:01
So since we can use a graph and calculator, i would just write these equations in as y equals.
00:06
So sine of x plus sine of 3x.
00:12
And then a second equation, which is y equals cosine of x.
00:17
Oops, i wrote that wrong.
00:19
So the red curve is the first one.
00:21
The blue curve is the cosine of x.
00:24
And we can actually zoom in between 0 and 6 .28 because that's 2 .8.
00:30
Because that's 2 pi.
00:32
I mean, this calculator is nice.
00:34
It actually gives you those values.
00:35
We only want the points of intersection between 0 and 2 pi.
00:40
And as you look, you can see it definitely crosses...