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Help with maths (A level)

Limitedrichy
By Limitedrichy
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Hey i have attached a question i am stuck with. The 1st part i can do and kind of the 2nd but the 3rd part just confuses me too much.I dont know where to make a start A=1 B=19

 

I dont normally ask for help in maths but this one i just cant not do been stuck on it for too long and is driving me mad :(  .Thank you 

post-14872-0-06423700-1402682600.png

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Posted

well do you have a graphic calculator? maybe a TI-86?

 

try wolframalpha. super easy to use

 

http://www.wolframalpha.com/input/?i=graph+acos%28t%29

 

 

yes I already have solved it but I am not going to give you the answer. 

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Wolframalpha is your friend!

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Yerr helping but not a lot. I will try some more 

I would like to help you but I have no fucking idea what a wave is.

I've just finished the 8th grade and I couldn't know that.

 

I helped as much as I could :D

Good luck.

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I do not understand this type of equation, i only understand the day and month thing before it :P

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For part B you wanna use wolfram alpha, and for part c.

R is equal to the square root of a^2 a b^2

and the angle is inverse tan b/a.

 

Im guessing this is a C3 question if you wanna look at a mark scheme its similar to question 8 in this paper, but its just an algebraic version, and more theoretical. Paper

The mark scheme is here 

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See now i like Algebra, but the OP question is not Algebra to me, or at least i don't think lol.

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It seems like you'd just draw a sin and a cos graph on the same graph, with the 'amplitude' of the lines being +- the day or the month respectively.

 

Then you need to add some waves which isn't on the A-Level side of things, at least not in C4, so you'll have to carry on from there

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Posted

nlbe4uy.jpg

 

well do you have a graphic calculator? maybe a TI-86?

 

try wolframalpha. super easy to use

 

http://www.wolframalpha.com/input/?i=graph+acos(t)

 

 

yes I already have solved it but I am not going to give you the answer.

Btw that's the graph of arc cosine lol. You clearly didn't check it/read the question :P

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