Mistakes give rise to Problems- 10

Geometry Level 4

In a fraction, if you cancel out the \(\cos\) and the \(^\circ\) symbol, like \[\dfrac{\cos (a^\circ)}{\cos (b^\circ)}= \dfrac{a}{b}\] then it's a \(\color{Red}{\textbf{Big Mistake!!!}}\)


But for how many ordered integer pairs \(\color{Blue}{(a,b)}\), such that \(-10\leq a,b \leq 10\) is the above said "false" property seen to be "true" ?


This problem is the 10th problem of my set Mistakes Give Rise To Problems

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