fhdjjskksj fhdjjskksj
  • 03-08-2020
  • Mathematics
contestada

Find X.
Round to the nearest tenth.

Law of Cosines : c2 = 22 + b2 - 2ab cos C

Find X Round to the nearest tenth Law of Cosines c2 22 b2 2ab cos C class=

Respuesta :

valerieulbrich
valerieulbrich valerieulbrich
  • 03-08-2020

Answer:

70.5°

Step-by-step explanation:

22² = (20)²+(18)² - 2(20)(18) cos X

484 = 400 + 324 - 720 cos X

-240 = -720 cosx

1/3 = cos X

[tex]cos^{-1}(\frac{1}{3})[/tex] = X

X = 70.52877937

Answer Link

Otras preguntas

Which of the following organisms can perform alcoholic fermentation? (1) yeast, (2) humans, (3) bacteria. a. 1 and 2 b. 1 and 3 c. 1 only d. 1, 2, and 3
Dominick lives 1 3/4 miles from his school.  If his mother drives him half the way, how far will Dominick have to walk to get to school?
which seismic wave moves through earth at the fastest speed?
“The genetic code is universal.” Explain this statement.
Which of the following can be considered fossils? a. a 1 billion year-old rock. b. a 1 billion year-old piece of amber. c. a 1 billion year-old piece of amber w
An airplane travels 3,260 kilometers in 4 hours. What is the airplane’s average speed?
How did scientists discover the common structure of cells?
If a slope of a line is 2/0 is it 0 or undefined?
Write a system of equations with a solution (4,–3)
How many atoms are in 0.750 moles of zinc?