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Unformatted text preview: Section 10.5
4. 6. 421 [ 9, 9] by [ 6, 6] [ 9, 9] by [ 6, 6] (a) 3 cos 5 , 6
1 3 sin
4 3 5 6 3 3 , 2
1 3 2 (a) r (3, 4) with 2, ( 3)2 ( 1)2 2, tan 1 3 1 3 7 . 6 (b) 5 cos tan (c) ( 1 cos 7 , (d) 2 5. 3 cos , 5 sin tan 4 3 in quadrant III. The coordinates are 2,
6 1 sin 7 ) 3 sin
2 3 (1, 0) ( 3, 3) also works, since r has the opposite sign and 2 ,2 3 differs by . (b) r
4 with in quadrant I. 3 4 4 The coordinates are 5, tan 1 . 5, tan 1 3 3 32 42 5, tan also works, since r has the opposite sign and
[ 6, 6] by [ 4, 4] differs (a) r ( 1)2 12 2, tan 1 1 by . 1 with
3 . 4 in (c) r
2 is undefined with 0 3 on the negative yaxis. The coordinates are 2, . 2 quadrant II. The coordinates are 2,
5 4 2, 0 ( 2)2 2, tan also works, since r is the same and differs by 2 . (b) r 12 ( 3)2 2, tan
3 1 3 2, 2 also works, since r is the same and differs by 2 . 3 with (d) r . 22 02 2, tan
0 2 0 with on the in quadrant IV. The coordinates are 2, 2,
2 3 positive xaxis. The coordinates are (2, 0). (2, 2 ) also works, since r is the same and 7. differs by 2 . also works, since r has the opposite sign and differs by . (c) r 02 32 3, tan
3 is undefined with 0 2 on
5 2
[ 6, 6] by [ 4, 4] the positive yaxis. The coordinates are 3, also works, since r is the same and (d) r ( 1)2 02 1, tan
0 1 . 3, differs by 2 . 8. 0 with on the negative xaxis. The coordinates are (1, ). ( 1, 0) also works, since r has the opposite sign and differs by .
[ 6, 6] by [ 4, 4] 9. [ 3, 3] by [ 2, 2] 10. [ 3, 3] by [ 2, 2] ...
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 Spring '08
 GERMAN

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