Math, asked by Rafea10127, 10 months ago

Can someone explain this step??!

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Answered by MediocreMin

1

Answer:

That is the formula for cos3x .

You can get that when you execute cos3x .

Do like cos (2x+x) , you will get it .

Answered by sruthisreejesh54

0

Answer:

If you inter change the -ve साइन you will get the answer

Step-by-step explanation:

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