Look on a unit circle graph and see what kind of pi it has. For example 90 degrees is pi/2
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You find the average rate of change of the function. That gives you the derivative on different points of the graph.
In the special case of two related variables (e.g., 2x - 7y + 5 = 0), the graph is a straight line.
If you reflect a function across the line y=x, you will have a graph of the inverse. For trigonometric problems: y = sin(x) has the inverse x=sin(y) or y = sin-1(x)
Degree graph has 360 segments , percntage has 100 segments
When people are taught trigenometry in school it is usually just for finding the angles of a triangle. But the sine and cosine functions are actually waves if you were to draw them on a graph. Acoustics is sound waves, and by mapping sound waves into trigonometric waves we can do calculations on them like addition.