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What is the expansion of cos(A+B+C) in terms of cos

What is the expansion of cos(A+B+C) in terms of cos
 

Grade:12

1 Answers

MP
13 Points
one year ago
Here’s your answer
cos(A+B+C) = cosA*cosB*cosC - cosA*sinB*sinC - sinA*cosB*sinC - sinA*sinB*cosC
 
 
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