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Nazyma
 3 years ago
PLEASE HELP ME!!!!!!! REALLY IMPORTANT!!!!!!!!!
y = −5 cos x
On what intervals within [0, T) is f increasing? (T is the period of the function. Enter your answer using interval notation. If an answer does not exist, enter DNE.)
Nazyma
 3 years ago
PLEASE HELP ME!!!!!!! REALLY IMPORTANT!!!!!!!!! y = −5 cos x On what intervals within [0, T) is f increasing? (T is the period of the function. Enter your answer using interval notation. If an answer does not exist, enter DNE.)

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ggrree
 3 years ago
Best ResponseYou've already chosen the best response.1hm. have you learned derivatives yet?

Nazyma
 3 years ago
Best ResponseYou've already chosen the best response.0That's the graph http://www.wolframalpha.com/input/?i=y%3D5cos%28x%29

ggrree
 3 years ago
Best ResponseYou've already chosen the best response.1ok, so all you have to do is draw out the function and I guess just look at it.

Nazyma
 3 years ago
Best ResponseYou've already chosen the best response.0yes, but can you plz exactly say where it is increasing?

ggrree
 3 years ago
Best ResponseYou've already chosen the best response.1notice that it starts at 5, right? it keeps going up from there. it's still moving up once it crosses the x axis.

ggrree
 3 years ago
Best ResponseYou've already chosen the best response.1once it hits pi, it starts to move down instead.

ggrree
 3 years ago
Best ResponseYou've already chosen the best response.1therefore your answer is [0, pi]. hopefully that helped.
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