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College Algebra & Trigonometry, 2018a

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514 CHAPTER 11. THE LAW OF SINES THE LAW OF COSINES<br />

Section 1.8 (cont.)<br />

13) − 2b − a<br />

3b − a<br />

15)<br />

(n +3)(n − 2)<br />

n − 1<br />

17)<br />

−x<br />

1 − x<br />

OR<br />

x<br />

x − 1<br />

Section 1.9<br />

1) x = −1, −5 3) y ≈ 3.449, −1.449 5) y =4<br />

7) x =6, −4 9) n =12, −2 11) x = −0.2, 3<br />

13) x ≈−2.256, −5.911 15) x =0, 16 17) x ≈ 0.884, −1.884<br />

19) y ≈ 5.919, −2.253 21) a =0, 2 3<br />

23) x = −0.625<br />

25) y = 3 7<br />

27) x ≈ 13.659, −0.659 29) x =1<br />

Section 2.1<br />

1) −7

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