shakirabreeding shakirabreeding

02-04-2018
Mathematics

contestada

The law of cosines a2+b2-2abcosC=c2. Find the value of 2abcosC.

The law of cosines a2b22abcosCc2 Find the value of 2abcosC class=

Respuesta :

dpokharnaotzjgn dpokharnaotzjgn

02-04-2018

A = 4
B = 3
C = 2

We need to find cos(C)

[tex]4 = 16 + 9 - 2(2)(3)(cos(C)) [/tex]
[tex]-21 = -12 * cos(C)[/tex]
[tex]cos (C)= 1.75[/tex]

The answer is [tex]2 * 3 * 4 * 1.75 [/tex] = 42

Answer Link

Otras preguntas

(10y^3+20y^2+55y)/5y

Find Domain of the functionsquare root of (x-8)/x(x-9)

Marika and Freddy sold 70 homes for Ron Realty. If Marika sold 2.5 times as many homes as Freddy, how many homes did each sell?

(10y^3+20y^2+55y)/5y

How were life forms affected by the rise in atmospheric oxygen levels that began 2.2 billion years ago?

what is the answer for (20,8),(9,16) ?

Find Domain of the functionsquare root of (x-8)/x(x-9)

Historians of china have traditionally dated the beginning of Chinese civilization to the founding of the what??

Prove that (x^5)-(x^2)+2x +3=0 has at least one real root. Prove that x=cosx has at least one solution.

how is mass transit in cities a possible solution tk urban air pollution?