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[Best Answer] Cos4x - cos3x + cos2x / sin4x + sin3x + sin 2x = cot 3x ...
![[Best Answer] Cos4x - cos3x + cos2x / sin4x + sin3x + sin 2x = cot 3x ...](https://hi-static.z-dn.net/files/d07/b73038cd07ffb7d8a9f8470a36322c34.jpg)