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Here is a link to the question:Calculus related rates question, Help please!?

A lighthouse is fixed 170 feet from a straight shoreline. A spotlight revolves at a rate of 12 revolutions per minute, (24 rad/min ), shining a spot along the shoreline as it spins. At what rate is the spot moving when it is along the shoreline 11 feet from the shoreline point closest to the lighthouse?

I got the answer: 4080π(sec(0.0646)^2) but it seems to be wrong, I don't understand what I am doing wrong, any help?

Calculus related rates question, Help please!? - Yahoo! Answers

I have posted a link there to this topic so the OP can find my response.