SOLUTION: arccos(x)=arccos(x/2) Solve for x, please

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Question 985633: arccos(x)=arccos(x/2)
Solve for x, please

Answer by ikleyn(52804)   (Show Source): You can put this solution on YOUR website!

Let   =   and   = .

Then   =  and  = .

Since   =   by the condition,  it implies that

= .

It is possible only if    = .

Answer.  x = 0.


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