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2003 Paper 2 question 6 - HSN forum

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2003 Paper 2 question 6


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#1 gary

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Posted 11 April 2005 - 09:03 PM

Can someone explain how the hell to do this please.

Thanks.

#2 werlop

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Posted 11 April 2005 - 10:17 PM

f(x) = cos(2x)-3sin(4x)
f'(x) = -2sin(2x)-12cos(2x)
f'( pi.gif /6) = -2sin( pi.gif /3)-12cos( pi.gif /3)
f'( pi.gif /6) = 6 - sqrt.gif

I've not checked that, as I can't find the marking scheme, looks OK though.
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If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
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Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
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