jenifferplowman
16.11.2019 •
Mathematics
Although we round it to 24 hr, the actual length of a day is 23 hr, 56 min, and 4.2 sec. how many seconds are there in an actual day?
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Ответ:
86,164.2 seconds
Step-by-step explanation:
There are 60 seconds in a minute, 60 minutes in an hour. Every hour has 3600 seconds. Multiply that by 23.
23×3600=82,800
multiply 60 by 56 for the seconds in the 56 minutes.
60×56=3360
add 82800+3360+4.2= 86,164.2
Ответ:
We suppose x ≠+/-π/2. (division by 0)
sec x=1/cos x
1-sec x= 1-1*cos x=(cos x -1)/cos x
(1-sec x)/(1-cos x)=(cos x -1)/(cos x*(1-cos x))=-1/cos x=- sec x