Answer:
See below.
Step-by-step explanation:
First, use the co-function identity:
We can turn the second term into cosine:
Substitute:
Now, use the sum to product formulas. We will use the following:
Substitute:
Use the even-odd identity:
Therefore:
Replace the second term with the original term:
Proof complete.
2.2 x 10 to the 5th power.
The digit in the tenths place is 8.
<h2>
The next terms are 16, 10, 4</h2>
Step-by-step explanation:
The given series is 46, 40, 34, 28, 22,... , ...., .....
The difference between each
46 -40 = 6
40 - 34 = 6
34 -28 = 6
28 - 22 = 6
22- x = 6 => 16
16 - x = 6 => 10
10 - x = 6 => 4
The standard deviation of the set is 5.2
To find standard deviation, we take the square root of the variance.
