Ask Experts Questions for FREE Help !
Ask
    lemon14's Avatar
    lemon14 Posts: 143, Reputation: 9
    Junior Member
    		  
    #1

    Oct 15, 2011, 03:01 AM
    Extreme values for f(x) = 3 cos3x - 4 sin3x - 2
    How to calculate the minimum and the maximum value of the function f(x) = 3 cos3x - 4 sin3x - 2 ?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #2

    Oct 15, 2011, 07:00 AM
    Find the derivative of the function, and then set the derivative to zero, solving for x.

    Or if you can do a sketch of the curve, you can already state the maximum and minimum values.

    Do you know how to do that?
    lemon14's Avatar
    lemon14 Posts: 143, Reputation: 9
    Junior Member
    		  
    #3

    Oct 15, 2011, 12:07 PM
    Well, not really.

    I haven't learnt about derivatives yet, so I guess the curve will help more.

    In this case, I can deal with it, I just didn't know this exercise required some other knowledge.

    Thank you very much.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #4

    Oct 15, 2011, 12:37 PM
    Derivative is just the same as differentiation, okay :)

    Otherwise, to make drawing easier, you could change it like that



    If you know how to use that.

    Expand the right:


    Then, put B = 3x
    If you can understand what you're doing, I'm sure the graph will become easy. :)
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Cellucor D4 extreme? [ 1 Answers ]

Has anyone tried the Cellucor D4 extreme diet pills? If so, has it helped them in anyway? I just recently purchased them and I am not sure if I should start taking them yet?? Please only positive responses.. THANKS...

Find the absolute extreme values of the function on the interval. [ 8 Answers ]

Currently taking Cal 1. I have an exam this Friday and still not strong solving the following problems from my book section. Can any one please show me the steps and the answer. -Find the absolute extreme values of the function on the interval. f(x) = tan x, -π/4 ≤ x ≤ π/6 Just in case...

Extreme happiness followed by extreme sadness [ 9 Answers ]

:confused: I am 20 years old and I have a problem. This is my first time posting a question on here, and I'm hoping to get some feedback. Maybe some ideas that I haven't heard before. See, I am generally a happy-go-lucky person. Most people see me as a REALLY happy girl, and I would even say...

Its gone from one extreme to the other! [ 2 Answers ]

We have a year old kitten, he has been spayed, and after the last trip to the vets, we were told he is fit and well. We have always had a problem with his litter box/training etc. when we got him we were told he was litter trained, we got him when he was 12 weeks old and he settled in well. Long...

View more questions Search