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.
Answer:
The interquartile range is 10.
Step-by-step explanation:
(xu-xl)=10
Sales tax:
0.06 x 1<span>6.48
about 0.99
Cost:
16.48 + 0.99
$17.47
The item's cost is </span>$17.47 with sales tax
Answer:
A. For a function to be a function, the x's cant repeat. ( don't know if that hans anything to do with the question lol) But the answer is A.
Step-by-step explanation:
Step-by-step explanation:
The absolute value of 10-(-6.5) is 16.5, therefore the distance between the points is 16.5 units