Answer: a quadrilateral with sides of different lengths.
Parallel sides are marked by arrows (single or double) btw
Answer:
Step-by-step explanation:
You use the Law of Cosines when you know all three sides and want to find the angles of a triangle.
For example, if you want to find ∠A, you use the formula
1. ∠ A
2. ∠B
3. ∠C
Note: I'm assuming you mean that
.
Taking the logarithm gives:
Using our rules of logarithms (
), we have:
This corresponds to answer A.
34 square inches I think you just divide the number in half.
<span>cos t(sect- cos t)
sec t = 1/cos t so
= cos t( 1/cos t - cos t)
= cos t / cos t - cos²t (distribute)
= 1 - cos²t
since sin²t + cos²t = 1, we have sin²t = 1 - cos²t
so
= sin² t
=right-hand side
</span>