# Thread: Find the period of each function, then sketch the graphs

1. ## Find the period of each function, then sketch the graphs

Find the period of each function, then sketch the graphs

a. y = 4sin2x

b. y = -4cos2x

I have no idea what that means..

2. Hello Draft
Originally Posted by Draft
Find the period of each function, then sketch the graphs

a. y = 4sin2x

b. y = -4cos2x

I have no idea what that means..
These are very basic questions. What have you been taught about sine and cosine functions? Have you any notes that give you a definition of the period of a trig function, or any sketch-graphs?

Grandad

3. no, i missed the lesson for this so i came here someone help me!

4. Hello Draft

You need to do some basic research on this topic. I Googled 'period of trig functions' and came up with several useful sites. Here are two of them. Here and here.

Have a close look at these, and then see if you can work out the answers to your questions. If you're not sure whether your answers are right, get back to us with your attempts and we'll let you know.

Grandad