Answer:
B.
Step-by-step explanation:
Hope this helpss!! I just know, not much time to explain!!
6. Expand the left side:
Recall the Pythagorean identity,
which leaves us with
Recall the angle sum formula for cosine:
which gets us to where we need to be:
and we're done.
7. A. The formulas you need are
This gives
7. B. Solving for gives
which holds for
where is any integer.
7. C. Factorize as
From here, we have
which hold for
where is any integer.
Answer:
Olivia can record 8 songs and have 0 time left on the CD.
Step-by-step explanation: