1) sin55°-sin35°/cos55°+cos35°
2) cos20°-cos140°/ cos20°+cos140°
3) sin37°+sin23°/ sin37°-sin23°
4) cos25°-cos85°/ sin25°+sin85°
ПОМОГИТЕ ПОЖАЛУЙСТА! ! ДАМ МНОГО БАЛЛОВ)))
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