Mathematics, 17.07.2019 02:00, stinkaq

Prove that : - cos3a-cosa/sin3a-sina+cos2a-cos4a/s in4a-sin2a=sina/cos2acos3a

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Prove that : - cos3a-cosa/sin3a-sina+cos2a-cos4a/s in4a-sin2a=sina/cos2acos3a...