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Mathematics, 14.02.2021 14:00 890777

Sin 50 - Sin 70 - Sin 40 + Sin 80 /
Cos 40 - Cos 50 - Cos 80 + Cos 70​

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Sin 50 - Sin 70 - Sin 40 + Sin 80 /
Cos 40 - Cos 50 - Cos 80 + Cos 70​...
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