Koliko postoji realnih brojeva
![x \in \left[ 1 , 2021 \right]](/media/m/7/c/8/7c84d69ffe44e4b457239f41fd061bff.png)
za koje vrijedi
How many real numbers
![x \in \left[ 1 , 2021 \right]](/media/m/7/c/8/7c84d69ffe44e4b457239f41fd061bff.png)
that satisfy

are there?
[lang=hr]
Koliko postoji realnih brojeva $x \in \left[ 1 , 2021 \right]$ za koje vrijedi
\[ \left( 1 - \frac{1}{8} \cos^2x \right) ^ 8 = \sin^2x ?\]
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[lang=en]
How many real numbers $x \in \left[ 1 , 2021 \right]$ that satisfy
\[ \left( 1 - \frac{1}{8} \cos^2x \right) ^ 8 = \sin^2x \]
are there?
[/lang]