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11-20-2009, 1:00 PM courtknee413 Joined on 04-22-2007 I MADE EYE CONTACT WITH MAJA IVARSSON. Posts 7,183 someone find a derivative for me It's for my online calculus homework Ok so I need the derivative of: It doesn't seem like it should be that hard but I can't figure it out.    Report

11-20-2009, 1:57 PM unitard Joined on 10-15-2008 . Posts 1,470 Re: someone find a derivative for me well, i think the 3 would disappear, as it is a constant, so the derivative would be (1/5)cos(3πt)? probably, or definitely, wrong but ah well    Report

11-20-2009, 3:02 PM cot266 Joined on 02-21-2009 T2V 5A1 Posts 217 Re: someone find a derivative for me I believe it would be (3*pi)/5*(cos(3*pi*t))    Report

11-20-2009, 3:08 PM unitard Joined on 10-15-2008 . Posts 1,470 Re: someone find a derivative for me  cot266 wrote: I believe it would be (3*pi)/5*(cos(3*pi*t)) will you show how u did that, nothing extremely detailed, just a wee method if it's not too long to write out, just cus i'm teaching myself some matymatyka    Report

11-20-2009, 3:18 PM courtknee413 Joined on 04-22-2007 I MADE EYE CONTACT WITH MAJA IVARSSON. Posts 7,183 Re: someone find a derivative for me  cot266 wrote: I believe it would be (3*pi)/5*(cos(3*pi*t)) Thank you soooo much. I see where I went wrong now.    Report

11-20-2009, 3:40 PM cot266 Joined on 02-21-2009 T2V 5A1 Posts 217 Re: someone find a derivative for me  courtknee413 wrote:  cot266 wrote: I believe it would be (3*pi)/5*(cos(3*pi*t)) Thank you soooo much. I see where I went wrong now. No problem :-). It's been about 5 years since I've seen a derivative. To the poster above, it's difficult to show here how to do it, but you're right the 3 turns into 0. The derivative of sin = cos, that part you got right. But you also have to take the derivative of 3*pi*t, which is 3*pi. Hope that helps.    Report

11-21-2009, 10:23 AM unitard Joined on 10-15-2008 . Posts 1,470 Re: someone find a derivative for me  cot266 wrote:  courtknee413 wrote:  cot266 wrote: I believe it would be (3*pi)/5*(cos(3*pi*t)) Thank you soooo much. I see where I went wrong now. No problem :-). It's been about 5 years since I've seen a derivative. To the poster above, it's difficult to show here how to do it, but you're right the 3 turns into 0. The derivative of sin = cos, that part you got right. But you also have to take the derivative of 3*pi*t, which is 3*pi. Hope that helps. fanku, as soon as i see 'sin', i expect it to be complicated, but i understand now    Report

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