babylilith32 babylilith32
  • 13-09-2019
  • Mathematics
contestada

find m angle A
A


10

B


20

C


16

D


14

find m angle A A 10 B 20 C 16 D 14 class=

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 19-09-2019

Answer:

  D.  14°

Step-by-step explanation:

The Law of Sines tells you sides are in proportion to the sine of the opposite angle:

  sin(A)/BC = sin(B)/AC

  sin(A) = BC/AC·sin(B)

  A = arcsin(BC/AC·sin(B)) = arcsin(7/28·sin(75°)) ≈ 13.974° ≈ 14°

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