Formula Griffiths 1
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Formula Sheet (taken principally from D. J. Griffiths: Introduction to Electrodynamics, Prentice Hall)
1
sin (2θ ) = 2 sin (θ ) cos(θ )
sin ( A ± B ) = sin ( A) cos(B ) ± cos( A) sin (B )
cos( A ± B ) = cos( A) cos(B ) ∓ sin ( A)sin (B )
sin ( A) ± sin (B ) = 2 sin[12 ( A ± B )]cos[12 ( A ∓ B )]
cos( A) + cos(B ) = 2 cos[12 ( A + B )]cos[12 ( A − B )]
cos( A) − cos(B ) = −2 sin[12 ( A + B )]sin[12 ( A − B )]
2
1
sin (2θ ) = 2 sin (θ ) cos(θ )
sin ( A ± B ) = sin ( A) cos(B ) ± cos( A) sin (B )
cos( A ± B ) = cos( A) cos(B ) ∓ sin ( A)sin (B )
sin ( A) ± sin (B ) = 2 sin[12 ( A ± B )]cos[12 ( A ∓ B )]
cos( A) + cos(B ) = 2 cos[12 ( A + B )]cos[12 ( A − B )]
cos( A) − cos(B ) = −2 sin[12 ( A + B )]sin[12 ( A − B )]
2
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