Trig+Graphs

=Trig Graphs by: Bernie, Julie, Caitlin, Hana=

VIDEO IS INSUFFICIENT - has to do with solving for the missing angle (inverse sine/cos) not graphing.
A trig graph expresses a trigonometric function and is significant because it is an image of the equation. graphs for cos and sin sin draw the sinusoidal axis draw the upper and lower bounds by using the amplitude find starting point of graph by setting the expression in =0 find the period place another high point where the period ends half way between two high points > low points half way between each high and low the graph crosses
 * cos starts at higher point

Sketch the graph:
 * STEP 4 :Problems Unsolved With Graph Included:**

1)

[[image:http://www.intmath.com/Trigonometric-graphs/Image869.gif width="97" height="33" caption="math expression"]]
media type="youtube" key="80c_F0-7ZxE" height="344" width="425"

media type="youtube" key="vHYI93UV5Kg" height="344" width="425"

2) //y// = 2 cos(//x// - π/8)



0One common mistake that is made when you’re doing trig graphs is when people mix up the characteristics of the graph. Ex. Period, amplitude, phase shift. Another common mistake is that people forget how to graph them. Sometimes, people don’t know what happens if x increases. I know that the value of cos x decreases, but people might think the opposite. When x increases, sin x increases then decreases, but people may not know that.