4 years ago

Find the value of x. Round to the nearest tenth.

Mathematics

1 answer:

aev [14]4 years ago

3 0

Answer:

C ≈ 22.1°

Step-by-step explanation:

The law of cosines formula is given. Solving it for C, we find ...

C = arccos((a^2 +b^2 -c^2)/(2ab))

where a and b are the sides adjacent to the angle.

Then we have ...

C = arccos((14^2 +19^2 -8^2)/(2·14·19)) = arccos(493/532)

C ≈ 22.1°

If you have a fair number of these to do, a spreadsheet is a useful tool. There are also triangle solver apps on the web or your local smart platform that will do this, too.

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