Unformatted text preview: c 2 = a 2 + b 2 ! 2 ab cos C sin( ! x ) = ! sin x cos( ! x ) = cos x cos 2 x = 1 + cos2 x 2 sin 2 x = 1 ! cos2 x 2 [these two for 16B and 21B]...
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 Spring '10
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