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terenzreignz
 one year ago
Best ResponseYou've already chosen the best response.0You'd do well to recall that \[\Large \sin(2\alpha) = 2\sin(\alpha)\cos(\alpha)\]

AonZ
 one year ago
Best ResponseYou've already chosen the best response.1btw the double angle formula is in a ratio is 2 to 1. just remember that :) sin4x = 2 sin2x cos2x
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