Make a diagram of the unit circle with an angle 0 in QI
Chapter 4, Problem 4.1.37(choose chapter or problem)
Make a diagram of the unit circle with an angle 0 in QI and its supplement 180 0 in QII. Label the point on the terminal side of 0 and the unit circle with (x, y) and the point on the terminal side of 1800 - 0 and the unit circle with (-x, y). Use the diagram to show that Show that tangent is an odd function.
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