How do you graph these points and show an excact scale?

Question

Y=Sin3x

Y=(1/(2))Cos (x/(2))

Y= Tan (Pie.3.14/(2))X

Answer 1

Michelle,
Consider first Y=Sin(3x).

The amplitude for this sin wave is 1 and its ‘moving’ 3 times faster then Sin(x) that is
While both will start at (0,0) Sin(3x) will reach maximum at x=pi/6 while Sin(x) will reach maximum at x=pi/2. The will Sin(3x) will cross x axis at x=pi/3 while Sin(x) will cross x axis at x=pi. And so on.

Similarly you graph other function.

If you know how Si(x), Cos(x) and tan(x) look like you should have no problem doing it by yourself.