C H A P T E R 5 Analytic Trigonometry
C H A P T E R 5 Analytic Trigonometry
C H A P T E R 5 Analytic Trigonometry
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
74.<br />
75.<br />
76.<br />
y 1 sec x csc x tan x cot x<br />
sec x csc x tan x 1<br />
cos x <br />
1 sin x<br />
<br />
sin x cos x<br />
<br />
1<br />
sin x 1<br />
cos x <br />
cos x<br />
1<br />
cos x sin x sin2 x<br />
cos x sin x<br />
1 sin2 x<br />
cos x sin x<br />
cos2 x cos x<br />
cot x<br />
cos x sin x sin x<br />
y1 1<br />
sin x 1<br />
cos x tan x<br />
cos x<br />
y1 1 1 sin cos <br />
2 cos 1 sin <br />
1<br />
2<br />
1 sin <br />
cos <br />
77. Let x 3 cos , then<br />
78.<br />
1 cos x<br />
<br />
sin x cos x sin x<br />
1 cos2 x<br />
sin x cos x sin2 x sin x<br />
tan x<br />
sin x cos x cos x<br />
cos 1 1 sin 1 sin cos cos <br />
<br />
1 sin 2 cos 1 sin cos 1 sin <br />
1<br />
1<br />
1<br />
<br />
2 1 2 sin sin2 cos2 <br />
cos 1 sin <br />
2<br />
2<br />
1 2 sin 1<br />
cos 1 sin <br />
2 2 sin <br />
cos 1 sin <br />
1 sin 1<br />
sec <br />
cos 1 sin cos <br />
9 x 2 9 3 cos 2 9 9 cos 2 91 cos 2 <br />
9 sin 2 3 sin .<br />
Let x 2 cos . 79. Let x 3 sec ,<br />
then<br />
64 16x 2 64 162 cos 2<br />
641 cos 2 <br />
64 sin 2 <br />
8 sin <br />
<br />
Section 5.1 Using Fundamental Identities 445<br />
−2 2<br />
6<br />
−6<br />
−2 2<br />
5<br />
−5<br />
−2 2<br />
9 tan 2 <br />
3 tan .<br />
4<br />
−4<br />
x 2 9 3 sec 2 9<br />
9 sec 2 9<br />
9sec 2 1