I don't understand this.. please help someone | Mathematics | Page 1

sullen badger Feb 28, 2023, 7:04 PM

#

Law of cosine

young sierra Feb 28, 2023, 7:05 PM

#

can you solve it? I've been trying for the past 20 minutes still cant get the right answer

sullen badger Feb 28, 2023, 7:06 PM

#

,w 21²=5x² - 4x²cos(120 deg)

fast micaBOT Feb 28, 2023, 7:06 PM

#

sullen badger Feb 28, 2023, 7:06 PM

#

is this the answer?

young sierra Feb 28, 2023, 7:07 PM

#

oh i was right

#

thanks

sullen badger Feb 28, 2023, 7:07 PM

#

And you can manage the rest on your own?

#I don't understand this.. please help someone