Mathematics
Mathematics, 15.01.2021 18:00, kittykat7315

Prove that ;
cos2A*cos3A-cos2A*cos7A/sin4A*sin3A -sin2A*sin5A = sin7A+sin3A/sinA

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Prove that ;
cos2A*cos3A-cos2A*cos7A/sin4A*sin3A -sin2A*sin5A = sin7A+sin3A/sinA...

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