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Mathematics: Post your doubts here!

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For Question 4:

a is 6.
b is 2.
c is 3.

Ok so how did i get those values? Using the graph. In any such equation

y = a sin(bx) + c

the a is the amplitude (maximum displacement from rest position)
b is the period (time it takes for one complete oscillation/wave)
c moves the graph up or down on the y axes.

So as you can see from the graph, the maximum displacement is 9-3=6. Therefore amplitude is 6 hence the value of a is 6.

B is how long it takes for the graph to go up, stop, go down, stop then come back up to the equilibirium position. Normally it's 2 pie. But here it's pie. Hence something is doubling the amount of time it takes for a complete wave. Therefore value of b is 2.

C is how up or down the graph is at the y axis. As you can see here, the y interceppt is 3 so c=3.

Question 5:

I did this on a paper and scanned it. Too complicated to explain here.

Part 1

http://i46.tinypic.com/2a8qfle.jpg

Part 2:

http://i46.tinypic.com/rwuxjm.jpg.

Hope i helped. Any more questions just ask. I checked all answers, they are all correct.
 
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Hey thanks panda222.
For graphs of sine cos and tan, can you brief me about the things that you should know about these, i mean in terms of amplitude etc...
One more thing, number 11 of same question paper. How do you do (iii)?
Thanks once again buddy.
 
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Hey thanks panda222.
For graphs of sine cos and tan, can you brief me about the things that you should know about these, i mean in terms of amplitude etc...
One more thing, number 11 of same question paper. How do you do (iii)?
Thanks once again buddy.
Hey can anyone plzz help me with this:-

can u shoe me each step plzzzzzzzzzzzzzzz or anyone
whitecorp
Amy Bloom
panda222
plzzzzzzzzzzzzzzzzzz
i m unable to upload my file so here is the link
http://www.mediafire.com/?u993euc8iqczo4v
 
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practical? U mean U want the whole working?
Bro are you gone crazy.....what else do u expect...i mean according to my understanding level or say a layman(mathematics studnet) can easily grasp ur wonderful steps..its a compelment bro..hha :) solve the one which i posted now
 
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