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ns36Best ResponseYou've already chosen the best response.0
You need to use the chain rule here: so the answer is (4 x cos^4 (pix  13)) x (sin( pix  13)) x pi.
 2 years ago

ncorrea92Best ResponseYou've already chosen the best response.1
Where did you get the 4 from?
 2 years ago

ns36Best ResponseYou've already chosen the best response.0
Oh sorry replace the 4 in front with a 5! so the first part should be ( 5cos^4(pix 13))(sin(pix  13))(pi)
 2 years ago

ns36Best ResponseYou've already chosen the best response.0
So the whole answer is what I posted above  that's not just the first part
 2 years ago

ncorrea92Best ResponseYou've already chosen the best response.1
So the (sin) shouldn't be raised to the 5?
 2 years ago

ns36Best ResponseYou've already chosen the best response.0
nope! because the first part of the chain rule is finding the derivative of (x^5), and the second is finding the derivative of (cos x), and the third part of the chain rule is finding the derivative of (pix  13).
 2 years ago

ns36Best ResponseYou've already chosen the best response.0
so you already took care of the raising to the 5 in the first part of the answer, where we have that termed raised to the 4.
 2 years ago

ncorrea92Best ResponseYou've already chosen the best response.1
Oh okay thank you. I get it now
 2 years ago
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