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# Alg2 lesson 13-2

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### Alg2 lesson 13-2

1. 1. Standard Position foran Angle:<br />Vertex at the origin<br />Initial side on the x-axis<br />y<br />90o<br />Terminal side<br />-180o<br />x<br />360o<br />Initial side<br />180o<br />-90o<br />270o<br />
2. 2. Draw the angle 210 in standard position.<br />y<br />90o<br />x<br />180o<br />270o<br />Example 2-1a<br />
3. 3. Draw the angle -45in standard position.<br />y<br />90o<br />x<br />180o<br />270o<br />Example 2-1a<br />
4. 4. Draw the angle 540 in standard position.<br />y<br />90o<br />x<br />180o<br />270o<br />Example 2-1a<br />
5. 5. Unit Circle<br />C =<br />C =<br />360o =<br />180o =<br />
6. 6. Answer:<br />Rewrite 30 in radians.<br />180o =<br />30 deg<br />Example 2-2a<br />
7. 7. Rewrite 45in radians.<br />180o =<br />45deg<br />45<br />Answer:<br />Example 2-2a<br />
8. 8. Rewrite in degrees.<br />180o =<br />radians<br />Answer: –300<br />Example 2-2b<br />
9. 9. Find one angle with positive measure and one angle with negative measure coterminal with 210.<br />y<br />A positive angle is<br />A negative angle is<br />90o<br />x<br />180o<br />270o<br />Example 2-4a<br />
10. 10. Find one angle with positive measure and one angle with negative measure coterminal with <br />A positive angle is<br />A negative angle is<br />Example 2-4b<br />