Come valuta #cos ((2pi) / 3) #?
Come valuta #cos ((2pi) / 3) #? Risposta: # -1/2# Spiegazione: The angle # (2pi)/3″ is in the 2nd quadrant “# where the cos ratio has a negative value. The related ‘acute angle’ to #(2pi)/3 =( pi -(2pi)/3) = pi/3 # #rArr cos((2pi)/3) = – cos(pi/3) # and using the #color(blue)” Exact value triangle”# # … Leggi tutto