scribe post, petra, trigonometry

We started the class with a warm-up quiz on quizlet. Then we worked on a few problems: example:
We went over hw problems we didn't know.
83)a which is so the answers are:
19) 0"> from the function value we get that
We decided that it's in the IV quadrant. We calculated hypotenuse using Pythagorean theorem. The answer is:




27) 2x-y=0, quadrant III we made a slope -> y=2x and found the sides of the triangle. Then using the sides of the triangle found all six trigonometric functions.
Then we went on the site for a Ferris Wheel. http://maine.edc.org/file.php/1/AssessmentResources/FerrisWheelUnitCircle32_L.html
We tried to make a graph where height was on y-axis and time on x-axis.
Then we used a function
We found it's domain: all real numbers
and range: [-1, 1]
Then we made a graph where f (θ) was on y axis and θ was on x axis.
We then used GeoGebra and made a graph for g(θ) = cos (θ), where we used different values for θ in radians.
At the end we used a function:
to define amplitude of sine and cosine curves -> amplitude = |a|
and to define a period of sine and cosine curves ->