1+cos2a+sin2a/cosa+sina. Created by tor23. matematika-ru

cosa+sina...

July 2022 1 9 Report

1+cos2a+sin2a/cosa+sina

MrBoba98 1+cos²a-sin²a-(2cosa*sina)/cosa+sina=cos²a+sin²a+cos²a+sin²a-2sina+sina=2cos²a-sina

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tor23 не квадраты, а двойной угол

MrBoba98 cos2a=cos^2a-sin^2a

MrBoba98 sin2a=2cosa*sina