Quiz and Stamps!

1. Quiz tomorrow! Here's an outline of what you want to study...

• Graphing sine and cosine with changes to amplitude, period, and vertical shifts
• For all of your graphs you are given "blank axes," not labeled ones like last night's homework
• That means you will label your x and y axes just like the take home quiz we had last weekend!
• Remember, period = 2pi/b!
• Know the shapes of sine and cosine!
• Use dotted lines to help you with the vertical shifts and amplitude!
• Write the equation of sine and cosine functions...
• Use the period to find b
• You have to know what "one cycle" looks like (for sine and cosine) so that you can identify how long the period is, then solve for b
• Remember, the "midline" is the value of "d," or our vertical shift!
• Midline = (max + min)/2
• The amplitude will help us with a! Then, to decide if a is + or -, look at the shape--is it reflected? (upside down)
• Amplitude = (max - min)/2
• Compare (provide two differences) for the graphs of sine and cosine

1. Stamps are due tomorrow!

• Count up your stamps and record the total on the front 
•  Double check your counting!
•  Only papers with actual stamps on them count! This time I'll be paying extra attention for people who sneak papers without stamps in.