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C H A P T E R 5 Analytic Trigonometry

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10.<br />

12.<br />

255 300 45 11.<br />

sin 255 sin300 45<br />

cos 255 cos300 45<br />

tan 255 tan300 45<br />

7<br />

12<br />

cos 7<br />

12<br />

sin 300 cos 45 sin 45 cos 300<br />

sin 60 cos 45 sin 45 cos 60<br />

3<br />

2<br />

2<br />

3 1<br />

4<br />

cos 300 cos 45 sin 300 sin 45<br />

cos 60 cos 45 sin 60 sin 45<br />

1 2 3 2<br />

<br />

2 2 2 2<br />

2<br />

1 3<br />

4<br />

<br />

<br />

<br />

<br />

<br />

3 4<br />

sin 7<br />

12<br />

2<br />

2<br />

tan 300 tan 45<br />

1 tan 300 tan 45<br />

tan 60 tan 45<br />

1 tan 60 tan 45<br />

3 1<br />

1 3<br />

<br />

sin <br />

3 4<br />

sin <br />

3<br />

3<br />

2<br />

cos <br />

3<br />

cos <br />

4<br />

2<br />

2<br />

2<br />

3 1<br />

4<br />

<br />

cos <br />

3 4<br />

cos <br />

4<br />

2<br />

1 3<br />

4<br />

2<br />

2<br />

1<br />

2<br />

2 3<br />

<br />

sin cos<br />

4 3<br />

2<br />

2<br />

1<br />

2<br />

<br />

sin sin<br />

3 4<br />

1 2 3 2<br />

<br />

2 2 2 2<br />

Section 5.4 Sum and Difference Formulas 473<br />

sin 11<br />

12<br />

cos 11<br />

12<br />

tan 11<br />

4<br />

tan 7<br />

12<br />

3 <br />

sin <br />

4 6<br />

sin 3<br />

4<br />

2<br />

2<br />

2<br />

3 1<br />

4<br />

3 <br />

cos <br />

4 6<br />

cos 3<br />

4<br />

3 2 1<br />

2 <br />

2 2 2 2<br />

3 <br />

tan <br />

4 6<br />

<br />

<br />

<br />

<br />

cos <br />

6<br />

3<br />

2<br />

cos <br />

6<br />

tan 3 <br />

tan<br />

4 6<br />

1 tan 3 <br />

tan<br />

4 6<br />

1 3<br />

3<br />

1 1 3<br />

3<br />

3 3<br />

3 3<br />

12 63<br />

6<br />

<br />

tan <br />

3 4<br />

<br />

<br />

tan <br />

tan<br />

3 4<br />

1 tan <br />

tan<br />

3 4<br />

3 1<br />

1 3<br />

2 3<br />

3 <br />

cos sin<br />

4 6<br />

2<br />

2 1<br />

2<br />

3 <br />

sin sin<br />

4 6<br />

3 3<br />

3 3<br />

2 3<br />

2<br />

3 1<br />

4

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