TheBlue2897 TheBlue2897
  • 13-03-2020
  • Mathematics
contestada

Which parts of △DEF can be determined using only the Law of Cosines?

Which parts of DEF can be determined using only the Law of Cosines class=

Respuesta :

PollyP52 PollyP52
  • 13-03-2020

Answer:

The length of DE,

Step-by-step explanation:

The law of cosines is applied when  2 sides and the included angle are known.

So here:

DE^2 = 6*2 + 9^2 - 2.6.9cos53.

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