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Mathematics, 09.12.2020 14:30 sin91
4(sin⁴ 60° + cos⁴ 60°) = 1 + 3(sin²60° - Cos² 60°)
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4(sin⁴ 60° + cos⁴ 60°) = 1 + 3(sin²60° - Cos² 60°)...
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