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OpenStudy (anonymous):
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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OpenStudy (turingtest):
more clear this way?|dw:1327767828172:dw|
OpenStudy (turingtest):
|dw:1327767954118:dw|
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