What is the expansion of cos(A+B+C) in terms of cos
sharan , 3 Years ago
Grade 12
Trigonometry> What is the expansion of cos(A+B+C) in te...
1 AnswersMP
Last Activity: 3 Years 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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