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anonymous
 5 years ago
how would i find the derivative of tanx3cos5x?
anonymous
 5 years ago
how would i find the derivative of tanx3cos5x?

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Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0do it in parts. First deal with tanx

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0the derivative of tan is \[\sec ^{2}x\]

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0sure you could also do it that way

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i know, but my teacher wants us using cos and sin identities right now

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0then use the quotient rule

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0have you learned the quotient rule?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yes, but using it with these kinds of problems is still not second nature, you know?

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0ya it will come with practice it's bottom times the derivitave of the top plus top times the derivative of the bottom all over the bottom squared.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so i consider the top to be (sinx/cosx) and the bottom to be...?

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0so cosx(cosx)sinx(sinx)/\[\cos ^{2}x\]

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0you will consider the top to be sinx and the bottom to be cos x

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so in using the quotient rule, i only deal with tanx?

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0right that part goes on bottom and the other part goes on top so cos squared minus sin squared on top

Jessica
 5 years ago
Best ResponseYou've already chosen the best response.0in using the quotient rule you deal with sinx/cosx

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0In any problem where you derive a function, you derive each term seperately. That's why you use the quotient rule on the sin(x)/cos(x) only. You'll just add the result of that to the derivative of 3cos(5x). Do you know the derivative of sin(x) and cos(x)?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you need to use the chain rule...See the linky... http://www.wolframalpha.com/input/?i=derivative+of+tanx3cos5x

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and make sure you click on "Show the Steps"
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