rosieposie27
09.01.2022 •
Mathematics
Pls answer will get brainliest!!!
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Ответ:
cos X/2 = ±√[(1 + cos X)/ 2]
But we have cos x=2/3
= ±√[(1 + 2/3)/ 2]
= ±√[(5/3 )/ 2]
= ±√[(5/5]
=±√1
Therefore answer is ±1
cos A/2 = ±√[(1 + cos A )/ 2]
Ответ:
Then the ratio is
(45 minutes):(minutes in 8 hours)
Then you can reduce to lowest terms in the usual way