В треугольнике ABC{"color":"#202335","fontFamily":"stix","language":"ru"} угол C=90{"color":"#202335","fontFamily":"stix","language":"ru"}, CH{"color":"#202335","fontFamily":"stix","language":"ru"} – высота, BC=15{"color":"#202335","fontFamily":"stix","language":"ru"}, BH=3{"color":"#202335","fontFamily":"stix","language":"ru"}. Найдите sinΑ{"color":"#202335","fontFamily":"stix","language":"ru"}.
