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burhan101
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge A(t)= 20\sin^2(\frac{ t }{ 1000\pi })\]

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2Use power + chain rules

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2This is a very straightforward question.

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0dw:1371609626141:dw

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2you forgot the final chain rule

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2dw:1371609898205:dw

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0@bahrom7893 what do you mean?

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2dw:1371610057029:dw

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2dw:1371610058623:dw

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0@bahrom7893 wait i dont get it tho, why the extra fraction :S

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2derivative of dw:1371610223598:dw

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2dw:1371610328327:dw

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0dw:1371610801029:dw @bahrom7893

Abhishek619
 one year ago
Best ResponseYou've already chosen the best response.0dw:1371610749100:dw

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2Guys stop confusing him. Burhan, your first answer was right. You just forgot to add in that fraction.

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0How do i simplify further ?

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2just use algebra, cancel out some fractions.

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0howww im really confused !!

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0The answer key says it should be \[\huge A'(t) = \frac{ 1 }{ 50\pi }\sin (\frac{ t }{ 50\pi })\]

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.22Sin(x)Cos(x) = ? (double angle formula)

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0if i just simplify that fraction to 'x' then =20((2sinx)(cosx)(x)) =20(xsinx)

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2.just use what I gave if you're still confused....

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2dw:1371612098284:dw

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2so according to our calculations, the answer should be: dw:1371612290008:dw which seemed right. the book might have a typo

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2........which is what I said 40 minutes ago........ dw:1371612421231:dw

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0thanks both !@bahrom7893 @primeralph

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2You're very welcome.

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0b) What is the first value of t greater than 0 for which the derivative is equal to 0?

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.2set the derivative equal to 0, then check the signs nearby

burhan101
 one year ago
Best ResponseYou've already chosen the best response.0@primeralph what does that mean ^ ?

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2for it to equal zero, you have to shift t by the period pi

primeralph
 one year ago
Best ResponseYou've already chosen the best response.2dw:1371615489438:dw
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