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Integral help, please??

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1. S sin^2 x cos^2 x dx 

2. S sinxcos2xds 

3. S sinxcox(x/2)dx
 
S indicates integration symbol.
asked Sep 12, 2014 in PRECALCULUS by anonymous
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3 Answers

0 votes

(1)

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sin2x = 2sinxcosx

sinxcosx = (sin2x)/2

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answered Sep 12, 2014 by friend Mentor
0 votes

(3)

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sinx=2sin(x/2)cos(x/2)

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answered Sep 12, 2014 by friend Mentor
0 votes

(2)

image

cos2x = 1 - 2sin²x

image

answered Sep 12, 2014 by friend Mentor

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