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(Not quite sure how to use Latex so I print screened it :tongue:)

[PLAIN]http://img87.imageshack.us/img87/5991/calc1.png [Broken]

So I've been staring at this question, and I think I might have it but I'm not 100% sure, is the answer just

t*cos t |

?

Or am I looking at the question wrong?

EDIT:

Oh I think I've got it, would the answer just be 4*cos 4 by FTC part 2?

[PLAIN]http://img87.imageshack.us/img87/5991/calc1.png [Broken]

So I've been staring at this question, and I think I might have it but I'm not 100% sure, is the answer just

t*cos t |

^{4}_{2x}= (4)*cos(4) - (2x)*cos(2x)?

Or am I looking at the question wrong?

EDIT:

Oh I think I've got it, would the answer just be 4*cos 4 by FTC part 2?

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