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Quin angle, en graus, formen els vectors begin mathsize 12px style bold left parenthesis begin bold style negative 4 end style bold comma begin bold style 1 end style bold right parenthesis bold space bold i bold space bold left parenthesis begin bold style negative 7 end style bold comma begin bold style negative 3 end style bold right parenthesis end style?


Dona la resposta en graus arrodonits la unitat: 45º

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