n = 4 values of intervals are change in By the trapezoidal rule I got 12.998638 (rounded to 6 decimal places but this is wrong.
Last edited by Jason76; August 3rd 2014 at 07:53 PM.
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Well, you can technically pull the 13 out to do the approximation first, and multiply it back in later on. But the thing is, is it cos(x^2) or cos^2(x)?
Actually I realized what the problem is now: you are supposed to use radians, not degrees. Always switch your mode to radians for calculus.
You have your calculator in "degree mode" when you should be using radians.
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