Question

What's the difference between cos2A and 2cosA

Answer 1

Answer:

"Cos", Or Cosine, Is Actually A Trigonometrical Operation On An Angle Producing A Ratio Or A Number. ... With This Principles, Cos2a Is Therefore, Not Equal To 2cosa, Since The 2a Is Being Operated With The Function "Cosine".

Explaination:

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