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# Coprimes Confusion

If $$a\div b=1$$ , then can we say that a and b are coprimes. Can a number be coprime to itself ? I got confused due to the text in this question - https://brilliant.org/practice/right-triangle-trigonometry/?p=3

Note by Abhijeet Verma
2 years, 4 months ago

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If gcd(a,b)=1, then a and b are coprime integers. In the case of a = b, gcd(a,a)=a which does not follow the definition. Hence, a number cannot be coprime to itself. (Based on my opinion) · 2 years, 4 months ago