Be sure that you are in DEGREES mode on your calculator.
1. Revisit the Moon Problem. If the diameter of the Moon is 1/4 the diameter of the Earth (look it up), and the angle subtended by the Moon is 0.5 degrees, how far away should the Moon be from Earth?
2. Consider a 3-4-5 triangle. Find the values of the angles in the triangle.
3. This one may be trickier. Make a graph of y = sin x, for values from 0 to 360 degrees. You could do this on your calculator, but make sure that you could also do it "by hand" - choosing several x values (30, 45, 60, 90, 120, 135 degrees, etc.) and plotting them on an axis. Graph paper may actually be best for this.
4. Repeat 3 for y = cos x.
5. How would the graphs for 3 or 4 above differ if there were coefficients? Say, y = 3x. How would the graph change? (This is an amplitude change.)
6. How would the graph change in this case: y = sin(2x)
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