cobyontiveros
03.06.2021 •
Mathematics
Verify which of the following are identities.
1) 13 secesin e = 13 cot 9 tanas
cote
2) 9
sec? o = 9 tan e cos e CSC29
CSC
a. None of the equations are identities.
b. Only the first equation is an identity.
C. Both the equations are identities.
d. Only the second equation is an identity.
on edge unit test hurry!!
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Ответ:
a = 4, d = 5 - 4 = 1, n = 150
Sn = n/2[2a + (n - 1)d]
S(150) = 150/2[2(4) + (150 - 1)1] = 75[8 + 149] = 75(157) = 11,775