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## Profile Information

• Gender
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• Exams
May 2012
• Country
Bosnia and Herzegovinia

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1. ## IA Type II - Fish Production

you have to find a,b,c and d using period ,amplitude and etc.... the last question I do not understand very much...you are talking about whole period between 1980 to 2006? or what? honestly i did not use tangent function in this IA... :/
2. ## IA Type II - Fish Production

yep but be careful because they want to find these values analytically...without technology...and for the last one i think it is cosine function...but im not sure...
3. ## IA Type II - Fish Production

yep....i got same...and if you plot this line on graph you will see that it is best fit curve...
4. ## IA Type II - Fish Production

when you find correct functions and parameters (a,b,c and d) you have to find best fit curve first using technology then analytically...
5. ## IA Type II - Fish Production

ok...thanks a lot and sorry for interrupting you...
6. ## IA Type II - Fish Production

ok desy, i get it...they are all constants...and i figured out how to find values of a,b and d analytically...but how do i find value for c without using technology...that is my problem... can you give me formula for calculating c from this function? :/ Yakuza... for the period between 1980 and 1988 i used cubic function...use TI or some computer program to plot the data and use cubReg to find a,b,c and d or look at previous posts from Desy if you need to find these values analytically.
7. ## IA Type II - Fish Production

I do not get it....(( these formulas for a and d, are they correct? if I write that c= b*x - sin^-1((y-d)/a) is c constant? :/
8. ## IA Type II - Fish Production

yes...but how to find analytically value of c? for example..d=(max+min)/2 a=(max-min)/2.... c= ? am i right?
9. ## IA Type II - Fish Production

ok, i know how to find a,b and d...but how do I find c?? is c constant? ://// because if i write like this (y-d)/a-sin(b*x)=sin C. it is different for different values of x and y.....:/
10. ## IA Type II - Fish Production

I will try that later on...and if i get some troubles I will post them here...)) one more time..Thank you...
11. ## IA Type II - Fish Production

Than you Desy...i think that i will figure out how to find a,b,c and d....now do you have hints how to find values for sine function?...
12. ## IA Type II - Fish Production

I want to model first table..where I got cubic function....using TI-84 i got values for a b c and trough cubicReg but how to find them analytically?
13. ## IA Type II - Fish Production

can you give me any hint how to find these values? thank you
14. ## IA Type II - Fish Production

Hi I have one question....does analytically means "without using technology?"...our teacher said that, but we can not figure out how to find values for a,b,c and d without technology... Thank you...
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