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anonymous
 one year ago
guys correct me if im wrong, ∫ cos 3x dx
answer: =∫cos(u)1/3 dx
cos(u)
=∫ dx
3
=1/3 sin (3x)
final answer : = sin(3x)
 +c
3
correct?
anonymous
 one year ago
guys correct me if im wrong, ∫ cos 3x dx answer: =∫cos(u)1/3 dx cos(u) =∫ dx 3 =1/3 sin (3x) final answer : = sin(3x)  +c 3 correct?

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campbell_st
 one year ago
Best ResponseYou've already chosen the best response.2well I know that \[\int\limits \cos(ax) ~dx = \frac{1}{a} \sin(ax) + C\] hope that helps

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.2so your answer looks correct

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1One nice way to double check the answer is by simply differentiating the answer you should get back the integrand if your answer is correct

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@campbell_st is right. you've got the correct answer.
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