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((sin 33^(@))/( sin 11^(@) sin 49^(@) si...

`((sin 33^(@))/( sin 11^(@) sin 49^(@) sin 71^(@)))^(2) + (( cos 33^(@))/(cos 11^(@) cos 49^(@) cos 71^(@)))^(2) ` is equal to ______.

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