loganreid loganreid
  • 25-04-2019
  • Mathematics
contestada

What’s the correct answer

Whats the correct answer class=

Respuesta :

gmany
gmany gmany
  • 25-04-2019

Answer:

79°

Step-by-step explanation:

Use the cosine law:

[tex]BC^2=AC^2+AB^2-2(AC)(AB)\cos A[/tex]

We have

BC = 14, AC = 11 and AB = 11. Substitute:

[tex]14^2=11^2+11^2-2(11)(11)\cos A\\\\196=121+121-242\cos A\\\\196=242-242\cos A\qquad\text{subtract 242 from both sides}\\\\-46=-242\cos A\qquad\text{divide both sides by (-242)}\\\\\cos A=\dfrac{-46}{-242}\\\\\cos A=\dfrac{23}{121}\\\\\cos A\approx0.1901\to m\angle A=79^o\\\\(\text{look at the table on a picture})[/tex]

Ver imagen gmany
Answer Link

Otras preguntas

I WILL MARK BRAINLIEST
write an expression for ''the number of pieces in three pack of mint gum.
What is a red drums diet.
Which statement best describes a primary source?
Please help! Extra points to first RIGHT answer!
How does Shakespeare develop Caesar’s character through Caesar’s interaction with those around him?
A model a rocket is used to test materials that will be used to build the body of the actual rocket. What is a limitation of this model? O A. It can be used to
The measures of KJ and LM are shown. What is the m
Can give brainliest!! Pls help, thnk u! :) Which statement best evaluates the effect of adding dialogue in the second version of the passage? Walking slowly aro
Según el artículo, ¿por qué decide Rubén Blades regresar a Panamá luego de haber ganado un premio Grammy? (A) Porque tenía que filmar una película (B) Porque te