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C H A P T E R 5 Analytic Trigonometry

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5.<br />

cos 2 sin 2 1 sin 2 sin 2 <br />

1 2 sin 2 <br />

7. sin2 sin4 sin2 1 sin2 8.<br />

9.<br />

11.<br />

csc2 cot csc2 1<br />

cot <br />

csc 2 tan <br />

1<br />

sin 2 <br />

csc sec <br />

1 cos 2 cos 2 <br />

cos 2 cos 4 <br />

sin <br />

cos <br />

1<br />

sin 1<br />

cos <br />

cot2 t<br />

csc t cos2 t<br />

sin2 sin t 12.<br />

t<br />

cos2 t<br />

sin t<br />

1 sin2 t<br />

sin t<br />

csc t sin t<br />

1<br />

<br />

sin t sin2 t<br />

sin t<br />

Section 5.2 Verifying Trigonometric Identities 451<br />

6.<br />

10.<br />

cos 2 sin 2 cos 2 1 cos 2 <br />

2 cos 2 1<br />

sin x<br />

cos x sin x tan x cos x sin xcos x<br />

cot3 t<br />

csc t cot t cot2 t<br />

csc t<br />

<br />

<br />

cos2 x sin 2 x<br />

cos x<br />

1<br />

cos x<br />

sec x<br />

cot tcsc2 t 1<br />

csc t<br />

cos t<br />

sin t csc2 t 1<br />

1<br />

sin t<br />

cos t sin t<br />

csc<br />

sin t<br />

2 t 1<br />

cos tcsc 2 t 1<br />

1<br />

tan tan 1 tan2 <br />

tan <br />

sec2 <br />

tan <br />

13. sin 12 x cos x sin 52 x cos x sin 12 x cos x1 sin 2 x sin 12 x cos x cos 2 x cos 3 xsin x<br />

14. sec6 xsec x tan x sec4 xsec x tan x sec4 xsec x tan xsec2 x 1<br />

15.<br />

1<br />

cos x<br />

cos x cot x cos x <br />

sec x tan x sin x<br />

cos2 x<br />

sin x<br />

1 sin2 x<br />

sin x<br />

1<br />

sin x<br />

sin x<br />

csc x sin x<br />

sec 4 xsec x tan x tan 2 x<br />

sec 5 x tan 3 x<br />

16.<br />

sec 1 sec 1 sec <br />

<br />

1 cos 1 1sec sec <br />

<br />

sec sec 1<br />

sec 1<br />

sec

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