Question: 4. Determine two positive and two negative principal angles for a terminal arm with a related acute angle of 20. in quadrant III. 5. Determine

4. Determine two positive and two negative principal angles for a terminal arm with a related acute angle of 20. in quadrant III. 5. Determine sin 0 to three decimal places if cos 0 = 1/2 and 0 is an angle in quadrant IV. 6. Is it possible to have an ambiguous case using the cosine law? If so, show an example. If not, explain why not

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