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Sunday 22 December 2019

How to prove by vector method Cos(A-B)= CosACosB+ SinASinB

How to prove by vector method Cos(A-B)= CosACosB+ SinASinB ?

Here is a proof of Cos(A-B)= CosACosB+ SinASinB  by using vector method. You can view the given pdf file.



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