( sin?x sin 2x dx

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 21E
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I dont end up with the correct final answer but i feel like my workings are correct. Have I made an error somewhere? If so please help me approach this question.

(8)
sin?xsin 2x dx
Transcribed Image Text:(8) sin?xsin 2x dx
Date:
8) sin?x sinlx dx
BUT SIn 2)
2 (OJ )( Sin
• Jin?x (asinx(osk) du
2/Jin3x COSX du
2/ sinx (sin?xl012) dn
Let
du s -sinx cɔc
du
-2/11-4?)(u) du
-2 ru-u3 du
%3D
4
- u2
+ u4 + c
%3D
to
(0s2x (-1
Transcribed Image Text:Date: 8) sin?x sinlx dx BUT SIn 2) 2 (OJ )( Sin • Jin?x (asinx(osk) du 2/Jin3x COSX du 2/ sinx (sin?xl012) dn Let du s -sinx cɔc du -2/11-4?)(u) du -2 ru-u3 du %3D 4 - u2 + u4 + c %3D to (0s2x (-1
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