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zarkam21:
B and c?
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Vocaloid:
that doesn't quite look right, if you try plugging in x = pi you'll get different answers for b and c this is kind of hard to visualize so I'd honestly suggest graphing them
zarkam21:
A and C
Vocaloid:
that's a good guess but sin(x) = cos(x-pi/2) not sin(x + pi/2) so it has to be A + B
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