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January 28, 2015

January 28, 2015

Posted by **anon** on Saturday, March 12, 2011 at 5:30pm.

(integer sign) cos^2 5x dx

A.(integer sign) 1 + cos 10x / 2 dx

B.(integer sign) 1 - cos 10x / 2 dx

C.(integer sign) 1 + cos 10x / 20 dx

D.(integer sign) 1 - cos 10x / 20 dx

A <<

- calculus -
**MathMate**, Saturday, March 12, 2011 at 5:58pmCorrect.

A.

∫(1 + cos(10x))/2 dx

using

cos(a)cos(b)=(1/2)(cos(a-b)+cos(a+b))

- calculus -
**anon**, Saturday, March 12, 2011 at 6:20pmThank you.

- calculus :) -
**MathMate**, Saturday, March 12, 2011 at 7:19pm:)

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