kayla8243
05.03.2020 •
Mathematics
Cos ■ = 7/14
A. 39°
B. 30°
C. 26.57°
D. 60°
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Ответ:
Option D:
Solution:
Given data:
Let the unknown degree be x.
To find the degree x:
Cancel the common factor 7 in the numerator and denominator.
Using trigonometry basic formula,
we know that
.
So, x = 60°.
The unknown degree measure is 60°.
Hence option D is the correct answer.
Ответ:
c.)
Step-by-step explanation: Standard deviation is distribute equally about the mean that is 50% of values less than the mean and 50% greater than the mean. So, 68% of data lies.