brianna00s brianna00s
  • 16-06-2020
  • Mathematics
contestada

Solve using cosine law only

Please please help this is due tomorrow morning

Solve using cosine law only Please please help this is due tomorrow morning class=

Respuesta :

Sally2020
Sally2020 Sally2020
  • 16-06-2020

Hints:

Step 1: Use Sine law the the angle B.

a/Sin A=b/SinB=c/SinC

24/Sin61^=12/SinB (accross multiply)

SinB=12Sin61^/24

SinB=0.437309853 then convert to degree =25.9 degree( depends on question rounded how many decimal) Read the question it must notes there.

--> Angle C=180-61-25.9=93.1 degree.

Step 2: Use Cosine law to calculate.

c^2=a^2+b^2−2ab⋅cosC

c^2=24^2+12^2-2(24)(12)cos93.1

c^2=720-576(-0.054078812)

c^2=720+31.11494

c^2=751.1494

c=27.4

(Square root take exponent off)

Step-by-step explanation:

Answer Link

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