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Unformatted text preview: x = 1 2 sin 2 x = 2 cos 2 x 1. Substituting x = 8 gives: cos 4 = 1 2 sin 2 8 sin 2 8 = 1 2 1 2 2 sin 8 = 1 2 2 4 (taking the positive square root, since 8 is in quadrant 1). a = 1 2 and b = 1 4 . Substituting x = 8 gives: cos 4 = 2 cos 2 8 1 cos 2 8 = 1 2 2 2 + 1 cos 8 = 2 4 + 1 2 (taking the positive square root, since 8 is in quadrant 1). c = 1 2 and d = 1 4 . 4. d dx cosh(sin x ) = d dx cosh( u ) where u = sin x = du dx d du cosh( u ) = cos x sinh( u ) = cos x sinh(sin x ) . Week 3 Tuesday 1011 Class...
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This document was uploaded on 03/19/2012.
 Three '11

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