November 11th, 2018, 11:59 AM  #1 
Newbie Joined: Nov 2018 From: Iran Posts: 12 Thanks: 0 Math Focus: calculus  Graph
any one can help with this problem: everything is okay until my book says>T=51 I really thought about it but didn't came up with anything of course I know a=2 > a+sin(0)=3 , a=1 
November 11th, 2018, 12:09 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,805 Thanks: 716 
The picture is confusing. What is your question?

November 11th, 2018, 12:13 PM  #3 
Newbie Joined: Nov 2018 From: Iran Posts: 12 Thanks: 0 Math Focus: calculus 
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. 
November 11th, 2018, 08:19 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,919 Thanks: 2202 
Try using a graphing calculator (or google) to plot y = 3  2sin((pi/2)x).

November 12th, 2018, 08:20 AM  #5 
Newbie Joined: Nov 2018 From: Iran Posts: 12 Thanks: 0 Math Focus: calculus 
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. 
November 12th, 2018, 10:04 AM  #6 
Senior Member Joined: Aug 2012 Posts: 2,355 Thanks: 736 
You're given the yintercept 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. 
November 12th, 2018, 12:23 PM  #7 
Newbie Joined: Nov 2018 From: Iran Posts: 12 Thanks: 0 Math Focus: calculus 
thanks just could you give a hint finding its Derivative

November 12th, 2018, 12:54 PM  #8 
Senior Member Joined: Aug 2012 Posts: 2,355 Thanks: 736  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. 
November 12th, 2018, 01:20 PM  #9 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,256 Thanks: 926 Math Focus: Wibbly wobbly timeywimey stuff.  
November 13th, 2018, 08:05 AM  #10  
Newbie Joined: Nov 2018 From: Iran Posts: 12 Thanks: 0 Math Focus: calculus  Quote:
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  

Tags 
graph 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Graph theory  diameter of biconnected graph  Estevan  Number Theory  2  November 4th, 2016 01:05 PM 
Graph theory: Linking graph characteristics and minimal cut  avnerg  Applied Math  0  September 18th, 2013 06:03 AM 
Cosine graph, sine graph basics confusion  taylor_1989_2012  Trigonometry  1  February 7th, 2013 09:07 AM 
Graph question: model system of inequalities as graph  moonlander  Applied Math  1  November 16th, 2011 05:44 AM 
graph theory  social networks and reverting the graph  johnyjj2  Applied Math  0  December 28th, 2010 02:49 PM 