valeriaportillow703q
valeriaportillow703q valeriaportillow703q
  • 12-07-2020
  • Mathematics
contestada

help a girl out pls n thx!!

help a girl out pls n thx class=

Respuesta :

Stephen46
Stephen46 Stephen46
  • 12-07-2020

Answer:

The answer is option A.

50 degrees

Step-by-step explanation:

To find angle C we use the cosine rule

That's

AB² = AC ² + CB ² - 2(AC)(CB)cos C

AC = 7.5

AB = 6

CB = 6.5

6² = 7.5² + 6.5² - 2(7.5)(6.5)cosC

36 = 56.25 + 42.25 - 97.5cos C

36 - 98.5 = - 97.5 cos C

-62.5 = - 97.5 cos C

cos C = -62.5 / - 97.5

C = cos ^-1 25/39

C = 50.1

The final answer is

C = 50°

Hope this helps you.

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