trig_identities - cos a cos b = 1 2 cos a b ( ) + cos a + b...

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Some Basic Trig Identities cos a ± b ( ) = cos a cos b m sin a sin b sin a ± b ( ) = sin a cos b ± sin b cos a sin2 a = 2 sin a cos a cos2 a = cos 2 a sin 2 a sin 2 a + cos 2 a = 1 sin 2 a = 1 2 1 cos2 a ( ) cos 2 a = 1 2 1 + cos2 a ( ) sin a sin b = 1 2 cos a b ( ) cos a + b ( ) [ ]
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Unformatted text preview: cos a cos b = 1 2 cos a b ( ) + cos a + b ( ) [ ] sin a cos b = 1 2 sin a b ( ) + sin a + b ( ) [ ]...
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This document was uploaded on 12/23/2011.

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