1. There are 6 fewer books in Ashley’s library than Jennifer’s. If there are 30 books total, how many books does Ashley have?
1 answer:
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Answer:
For a rectangular prism-like swimming pool: .
when
,
and
.
Step-by-step explanation:
Let assume that swimming pool has a rectangular base and depth is the same at any point at the bottom. In addition, let and
be the width and length of the swimming pool. Then, the volume needed to fill the swimming pool is:
, where
is the depth of the pool.
Let be ,
and
. The volume of the swimming pool is:
ANSWER
EXPLANATION
We want to solve
where
We reciprocate both sides of this trigonometric equation to obtain:
We take arctangent of both sides to get;
This is the principal solution.
The tangent ratio is also positive in the third quadrant.
The solution in the third quadrant is