How do I draw this graph? Eg. $\cos\pi$ starts at y=1, flows down to x=$\pi$ as the mid point where y=-1 and goes back to y=1.
I'm not sure how to decipher the $2\pi10t$ here and put them into figures in a graph.
How do I draw this graph? Eg. $\cos\pi$ starts at y=1, flows down to x=$\pi$ as the mid point where y=-1 and goes back to y=1.
I'm not sure how to decipher the $2\pi10t$ here and put them into figures in a graph.
You probably know the basic shape of a cosine curve.
$\cos x$ is $1$ when $x=0$, is $0$ when $x=\pi/2$, is $-1$ when $x=\pi$, is $0$ when $x=3\pi/2$, and is $1$ when $x=2\pi$, and then the pattern repeats.
So $\cos (2\pi 10 t)$ is $1$ when $t=0$, is $0$ when $t=1/40$, is $-1$ when $t=1/20$, is $0$ when $t=3/40$, and is $1$ when $t=1/10$, and then the pattern repeats.