bm42400
bm42400 bm42400
  • 10-04-2019
  • Mathematics
contestada

If B=16º45' and c=13, then find a.

If B16º45 and c13 then find a class=

Respuesta :

jamuuj jamuuj
  • 10-04-2019

Answer:

a = 12.4 units

Step-by-step explanation:

We can use trigonometric ratio; Cosine

Cosine = Adjacent/ Hypotenuse

Cos B = a/c

But; c = 13 and a =?

B = 16° 45' = 16.75°

Therefore;

Cos 16.75 ° = a/13

a = 13 × cos 16.75°

  = 12.4 units

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