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Evaluate the following definite integrals
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\[\int\limits_{3}^{4}2\sin2x dx\]
wolframalpha.com
u=2x du=2dx if x=4, u=8 if x=3, u=6 \[\int\limits_{6}^{8}sinu du=-cosu|=-\cos8+\cos6\]
yea thats what i got... my teacher must have put something in incorrectly...
why?
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i dunno... ive done it like 10 times and i keep getting 1.11 (same as my tutor) but Lecturer got 0.88 :S:S:S
did you have it in radians or degrees?
radians and degrees gegrees i got .81 or something like that but not .88
i got 1.10 radians and .004 in degrees your teacher made a mistake
yea... guessed as much lol.. >.< thanks though :D (currently writing cheat sheet for exam tomorrow) >.<
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