On which triangle can the law of cosines be used to find the length of an unknown side? law of cosines: a2 = b2 + c2 – 2bccos(a)

2 answers:

7 0

A²=b²+c²-2bc Cos (a)
In this case , we can find the length of side a using the above cosine law.
If you are given the values of side b , c and angle a, then it is easy to calculate the length of side a.
To find side b,
b²=a²+c²-2ac Cos(b)
To find side c,
c²=b²+c²-2bc Cos (c)
Just the given values in the formula and get the length of the missing side. You can also find the missing angle using these formulas.

I hope this will help you.

lapo4ka [179]3 years ago

3 0

Answer:

It's B on edge

Step-by-step explanation:

I got it right

Also, to everyone who is mad at the first person who answered this, they probably don't have edge and the person who asked the question didn't give a picture. They did their best

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Crazy boy [7]

3 0

3 years ago

SOMEONE PLEASE HELP!

prisoha [69]

Answer:

$XY=16.2$

Step-by-step explanation:

It is given that the two figures are similar. This means that the ratio between the corresponding sides is equal. In essence, a side in the larger figure over its corresponding side in the smaller figure is equal to another side in the larger figure over its corresponding side in the smaller figure. Therefore, one can set up a proportion and solve to find the unknown side.

$\frac{WX}{ST}=\frac{XY}{TU}$