Даны векторы a→14;-2{"color":"#202335","fontFamily":"stix","language":"ru"} и b→-7;-1.{"color":"#202335","fontFamily":"stix","language":"ru"} Найдите cosa{"color":"#202335","fontFamily":"stix","language":"ru"}, где a{"color":"#202335","fontFamily":"stix","language":"ru"} – угол между векторами a→{"color":"#202335","fontFamily":"stix","language":"ru"} и b→.{"color":"#202335","fontFamily":"stix","language":"ru"}
