The averages of the squared differences between the data values and the mean is known as
1 answer:
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Answer:
(d).
Step-by-step explanation:
sin² β + cos² β = 1
cos (α + β) = cos α cos β - sin α sin β
cos α = √(1 - ) = 21 / 29
cos β = 12 / 13
sin β = √(1 - ) = 5 / 13
sin α = 20 / 29
cos (α + β) = ×
-
×
=
Answer:
Step-by-step explanation:
When you multiply, always start on the first value. In this case, this would be 2 from 72.
Write now, you should have 82 as your first value.
Now for your second value, which would be 7. But first you need to add a zero, because you are doing the tens place.
<u>Now you put the two over your next equation:</u>
and
Now you should have 980 written.
<u>Now add your two numbers together:</u>
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