What is the answer for the formula of cos (A+B) ----------------------------_____________________________:------------------------

What is the answer for the formula of cos (A+B)  ----------------------------_____________________________:------------------------


2 Answers

90 Points
one year ago
My dear friend,
The correct answer for which you
is cosa+b=cosAcosB-sinAsinB.
I think it is useful for you
thank you. 
Wright Eva
39 Points
5 months ago
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