sin 2x 29. sin x cos 2r = sec x cos x

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 41E
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Question
Verify number 29 and 31 using the double angle identities or half angle identities
sin 2x
29.
sin x
cos 2r
= sec x
Cos x
sin x
cos 3x
30.
sin 3x
cos 2r
cos x
sin 3x cos x
sin 3x
31. tan 2x + tan x =
Cos 2x cos X
Transcribed Image Text:sin 2x 29. sin x cos 2r = sec x Cos x sin x cos 3x 30. sin 3x cos 2r cos x sin 3x cos x sin 3x 31. tan 2x + tan x = Cos 2x cos X
sec 6 =
Cos 8 =
tan 8+1 = sec
Cos e
sec e
cot e=
tan 8 =
cot20 +1 = csc2e
tan e
cot e
IES
DOUBLE ANGLE IDENTITIES
HALF ANGLE IDENTITIES
sin (20) = 2 sin e cos e
%3D
1-cos 0
sin
cos(26)
= cos?e - sin? 8
= 2 cos 6-1
1+cos 8
COs
=1-2 sin 6
2 tan 6
()
cos 8
tan(20) =
%3D
tan
1-tan
1+ cos 0
NTITIES
SUM TO PRODUCT IDENTITIES
) cos(a +)]
sin a + sin B = 2 sin
COS
%3D
Transcribed Image Text:sec 6 = Cos 8 = tan 8+1 = sec Cos e sec e cot e= tan 8 = cot20 +1 = csc2e tan e cot e IES DOUBLE ANGLE IDENTITIES HALF ANGLE IDENTITIES sin (20) = 2 sin e cos e %3D 1-cos 0 sin cos(26) = cos?e - sin? 8 = 2 cos 6-1 1+cos 8 COs =1-2 sin 6 2 tan 6 () cos 8 tan(20) = %3D tan 1-tan 1+ cos 0 NTITIES SUM TO PRODUCT IDENTITIES ) cos(a +)] sin a + sin B = 2 sin COS %3D
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