Form the vector products B C and B C, where B = B, and use
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Form the vector products B × C and B′ × C, where B = B′, and use the results obtained to prove the identity
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sina cos B -D sin (a+ B) + }sin (a - в). .C B'
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46 B B B Bcos Bi sin j B Bcos Bi sin j C Ccosai sin ...View the full answer
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