Rumus Sudut Rangkap Dua



Rumus Sudut Rangkap Dua
sin 2A = 2 sin A cos A ,
cos 2A = cos^2 A - sin^2 A = 2 cos^2 A -1 = 1-2 sin^2 A ,
tan 2A = {2 tan A over 1 - tan^2 A} = {2 cot A over cot^2 A - 1} = {2 over cot A - tan A} ,

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