Ответ:
а) sin2a/2tga = sin/tg = nsi/gt
б) 1+cos2a/1-cos2a = 1+2acos/1-2acos
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Ответ:
а) sin2a/2tga = sin/tg = nsi/gt
б) 1+cos2a/1-cos2a = 1+2acos/1-2acos