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sin4(10∘)+sin4(50∘)+sin4(70∘)= ? \large \sin^{4}(10^{\circ})+\sin^{4}(50^{\circ})+\sin^{4}(70^{\circ})= \ ? sin4(10∘)+sin4(50∘)+sin4(70∘)= ?
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sin4(10∘)+sin4(50∘)+sin4(70∘)= ?
