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College Trigonometry, 2011a

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934 Applications of <strong>Trigonometry</strong><br />

9. (−20, 3π), (−20,π)<br />

(20, −2π), (20, 4π)<br />

1<br />

y<br />

−20 −10 10 20<br />

−1<br />

x<br />

10.<br />

(<br />

−4, 5π ) (<br />

, −4, 13π )<br />

( 4<br />

4<br />

4, − 7π ) (<br />

, 4, 9π )<br />

4 4<br />

4<br />

3<br />

2<br />

y<br />

1<br />

−4 −3 −2 −1<br />

−1<br />

1 2 3 4<br />

−2<br />

−3<br />

−4<br />

x<br />

11.<br />

(<br />

−1, 2π ) (<br />

, −1, 8π )<br />

3 3<br />

(<br />

1, − π ) (<br />

, 1, 11π )<br />

3 3<br />

2<br />

1<br />

y<br />

−2 −1 1 2<br />

−1<br />

x<br />

−2<br />

12.<br />

(<br />

−3, π ) (<br />

, −3, 5π )<br />

2 2<br />

(<br />

3, − π ) (<br />

, 3, 7π )<br />

2 2<br />

3<br />

2<br />

1<br />

y<br />

−3 −2 −1<br />

−1<br />

1 2 3<br />

−2<br />

−3<br />

x

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