Hey there, trig peeps.  Today we will be talking about how to graph sin, cos, and tangent functions.  Wow.  It is so exciting!  Well, kinda in a nerdy way it is.  We have all seen those sin waves, but understanding what they represent is a little difficult.  First, we should take a look at the upcoming chapter in our textbooks.  Go look at the section about graphing sin and then come back.  Go ahead… I’ll wait.

Ok.  Did you read it?  No?  Me neither.  I got about half-way through the first page and fell asleep.  Then I woke up, tried to read it again, and got so bored that I stabbed myself in the eyes with my pencil so I would have an excuse not to have to read it any more.

Then, I found the following video.  It does a great job of illustrating what a sin, cos, and tan graph really represent.  Granted, it is NOT the most exciting video I have ever seen, but it makes a booty-load more sense than the book.  It also incorporates reflections, periods, and amplitudes from the previous chapter.  It actually is pretty good.  Let’s watch it now.  Get comfy, though.  It’s almost half an hour long.

Get it?  Got it?  Good!  Now, we can talk about it.  But first, I know you have been sitting for a while, so let’s get on our feet and do a little exercise.  C’mon!  up on your feet!  That means you over there still sitting in the chair!  Click the following video and try to follow along.