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anonymous
 4 years ago
In Session 78: Computing the Length of a Curve » Clip 3: Example: Circular Arc (7 min) they get to the sin(alpha)=a. But "a" is on the x line, and as far as i know that's actually the cosine of alpha. Am I missing something here? I can't imagine how can that horizontal "a" be a sine of the angle.
anonymous
 4 years ago
In Session 78: Computing the Length of a Curve » Clip 3: Example: Circular Arc (7 min) they get to the sin(alpha)=a. But "a" is on the x line, and as far as i know that's actually the cosine of alpha. Am I missing something here? I can't imagine how can that horizontal "a" be a sine of the angle.

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TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.3more clear this way?dw:1327767828172:dw

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.3dw:1327767954118:dw

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.3...if we had alpha on the right insteaddw:1327768032374:dwthen a would be the cosine

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Oh it's the other angle, missed that! Thanks! :)
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