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2001 paper 2 question 10 - HSN forum

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2001 paper 2 question 10


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#1 oddbins

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Posted 06 April 2005 - 01:07 PM

can anyone help me for question 10, I managed to get:

root3= -1/3 cos 150x + c

but I don't no if this is right. Can you tell me what I do next? plz. unsure.gif

#2 Dave

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Posted 06 April 2005 - 03:56 PM

you have released you have to integrate howver ithink you have integrated wrongly

integral.gif 3sin(2x)

you can take the 3 outside the integral..makes things simpleir

3 integral.gif sin(2x)

so now its a simple integral using the general forumula inthe front of the past paper

3(-1/2cos(2x))+c

-3/2cos(2x) + c

at this point you can sub in the point you evere given

y= -3/2cos(2x) + c
sqrt.gif 3 = -3/2cos(5/6 pi.gif ) + c

c = 0.2

y = -3/2cos(2x) + 0.2

If i am not here i am somewhere else



#3 oddbins

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Posted 06 April 2005 - 04:39 PM

Ah, I see where I went wrong! huh.gif
Thanks for the help, it all makes sense now!!






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