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November 11th, 2018, 11:59 AM   #1
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any one can help with this problem:

everything is okay until my book says---->T=5-1
I really thought about it but didn't came up with anything
of course I know a=2 ---> a+sin(0)=3 , a=1
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November 11th, 2018, 12:09 PM   #2
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The picture is confusing. What is your question?
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November 11th, 2018, 12:13 PM   #3
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I can't find the period

the times it is repeated

I mean the formula T=2pie
-----
|a|

Last edited by shadow dancer; November 11th, 2018 at 12:22 PM.
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November 11th, 2018, 08:19 PM   #4
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Try using a graphing calculator (or google) to plot y = 3 - 2sin((pi/2)x).
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November 12th, 2018, 08:20 AM   #5
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It's in our ((konkur))

an examination in which you can't use even the simplest calculators
which do simple things like addin' up

(you know I want the value of graph at point x=25/3)

Last edited by shadow dancer; November 12th, 2018 at 08:28 AM.
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November 12th, 2018, 10:04 AM   #6
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You're given the y-intercept and two critical points.

Take the derivative of your function, plug in the critical points and set the derivative equal to zero to find possible values for b. Plug 0 into the original equation to find a. Then just plug in 25/3.
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November 12th, 2018, 12:23 PM   #7
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thanks just could you give a hint finding its Derivative
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November 12th, 2018, 12:54 PM   #8
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Quote:
Originally Posted by shadow dancer View Post
thanks just could you give a hint finding its Derivative
Hint: Read your textbook.

I don't mean to sound glib or unfriendly, but if you are studying calculus you should be able to take that derivative in you head, since the question implies you've seen the required information. If not, that's where you need to review. Sum rule, constant rule, derivative of sin function, chain rule.
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November 12th, 2018, 01:20 PM   #9
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Quote:
Originally Posted by shadow dancer View Post
any one can help with this problem:

everything is okay until my book says---->T=5-1
I really thought about it but didn't came up with anything
of course I know a=2 ---> a+sin(0)=3 , a=1
Is this just me or is the graph not a sinusoidal function?

-Dan
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November 13th, 2018, 08:05 AM   #10
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Quote:
Originally Posted by Maschke View Post
Hint: Read your textbook.

I don't mean to sound glib or unfriendly, but if you are studying calculus you should be able to take that derivative in you head, since the question implies you've seen the required information. If not, that's where you need to review. Sum rule, constant rule, derivative of sin function, chain rule.

thanks for summery it's my last year , I've to wait literally till the end of the

year anddd please help my book has solved it in the most ridiculous way

possible
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