dragonmaster2450 dragonmaster2450

11-06-2020
Mathematics

contestada

In △DEF, d = 25 in., e = 28 in., and f = 20 in. Find m∠F. Round your answer to the nearest tenth.

Respuesta :

sqdancefan sqdancefan

17-06-2020

Answer:

∠F ≈ 43.9°

Step-by-step explanation:

The Law of Cosines is used to find an angle when all triangle sides are known.

f² = d² +e² -2de·cos(F)

cos(F) = (d² +e² -f²)/(2de) = (25² +28² -20²)/(2·25·28) = 1009/1400

F = arccos(1009/1400)

F ≈ 43.9°

Answer Link

Otras preguntas

The ancient language of India is called _____. Linear A Sanskrit Linear B Shinto

If I = prt, the value of I when p = 1,000, r = 0.05, and t = 3 is

Autobiographies deal with real events and people that affected a writer s life. a. True b. False

20.681+19.39+20.56 estimate sum

While giving a presentation, a person should revise and edit the speech. time the speech in advance. speak loudly and clearly. practice using media.

Is academics or sports more important? Create a list of pros and cons for both sides.

Which of the following factors does NOT help determine the height, length, and period of a wave? a. wind speed b. fetch c. temperature d. how long the wind

_______ discovered that there were other galaxies besides the Milky Way. A. Albert Einstein B. Sir Isaac Newton C. Edwin Hubble D. Galilei Galileo

Most reactive non-metals in order?

what does kinetic force mean? (in a politic definition) :)