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C H A P T E R 5 Analytic Trigonometry

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49.<br />

50.<br />

52.<br />

tan 2 tan 12 0<br />

tan 4tan 3 0<br />

tan 4 0<br />

arctan4 n<br />

arctan4 ,<br />

x arctan5 2<br />

tan 3 0<br />

arctan 3 n<br />

arctan4 2, arctan 3, arctan 3 <br />

sec 2 x 6 tan x 4 0 51.<br />

1 tan 2 x 6 tan x 4 0<br />

tan 2 x 6 tan x 5 0<br />

tan x 5tan x 1 0<br />

tan x 5 0 or tan x 1 0<br />

tan x 5 tan x 1<br />

x arctan5 x 3 7<br />

,<br />

4 4<br />

sin345 sin300 45 53.<br />

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

3<br />

2<br />

2<br />

4<br />

<br />

<br />

2<br />

2<br />

cos345 cos300 45<br />

2<br />

1 3<br />

4<br />

tan345 tan300 45<br />

4 23<br />

2<br />

1 2<br />

<br />

2 2<br />

2<br />

3 1 1 3<br />

4<br />

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

1 2<br />

<br />

2 2 3 2 2<br />

2<br />

tan 300 tan 45 3 1 1 3<br />

<br />

1 tan 300 tan 45 1 31<br />

<br />

1 3<br />

2 3<br />

sin 285 sin315 30<br />

cos 285 cos315 30<br />

<br />

Review Exercises for Chapter 5 515<br />

sin 315 cos 30 cos 315 sin 30<br />

2 2 3<br />

2 2<br />

2 1<br />

2<br />

2<br />

3 1<br />

4<br />

cos 315 cos 30 sin 315 sin 30<br />

2<br />

2 3<br />

2 2 2 1<br />

2<br />

2<br />

3 1<br />

4<br />

tan 285 tan315 30 <br />

sin 25<br />

12<br />

cos 25<br />

12<br />

tan 25<br />

12<br />

1 3<br />

3 <br />

1 1 3<br />

3 <br />

11 <br />

sin <br />

6 4<br />

11 <br />

cos <br />

6 4<br />

11 <br />

tan <br />

6 4 <br />

tan 315 tan 30<br />

1 tan 315 tan 30<br />

2 3<br />

sin 11<br />

6<br />

1 2 2<br />

2 3<br />

2 2<br />

2 <br />

cos 11<br />

6<br />

3<br />

2 2<br />

2 1<br />

2 2<br />

2 <br />

tan 11 <br />

tan<br />

6 4<br />

1 tan 11 <br />

tan<br />

6 4<br />

3 3 1<br />

1 3<br />

2 3<br />

3<br />

1<br />

cos <br />

4<br />

2<br />

3 1<br />

4<br />

cos <br />

4<br />

11 <br />

cos sin<br />

6 4<br />

11 <br />

sin sin<br />

6 4<br />

2<br />

3 1<br />

4

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