Geo777
25.07.2019 •
Mathematics
4) a safe contains 120 coins, the value of which is $10. if the coins consist of nickels and dimes, how many of each kind are in it?
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Ответ:
Ответ:
we know that (cosu(t))' = -u '(t) sin u(t)
so (cos^2(pi)(t)) ' = 2 (-pi sin pit) cospit
and finally the answer is
[5cos^2(pi)(t)] ' = -10 pi sin pit cospit