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25.09.2019 •
Mathematics
What is 98,464 rounded to the nearest ten thousands ?
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Ответ:
Ответ:
c. cos ( a - b ) = cos a cos b + sin a sin b
Step-by-step explanation:
Using 180 as a and q as b:
cos (180 - q) = cos 180 cos q + sin 180 sin q
cos 180 = -1
sin 180 = 0
cos (180 - q) = (-1) cos q + (0) sin q
cos (180 - q) = -cos q