Respuesta :

DWRead

Answer:

Step-by-step explanation:

sin(62°) = 25/BA

BA = 25/sin(62°) ≈ 28.3

Angle BAC = 180°-90°-62° = 28°

BC = √((BA)^2-(AC)^2) = 13.3

cosC = 0

mhanifa

Answer:

  • A and D are correct

Step-by-step explanation:

Given ΔABC

  • ∠C = 90°
  • ∠B = 62°
  • AC = 25

The options:

A. 25/BA = sin 62° ⇒ BA = 25/sin 62° = 28.3 ≈ 28

  • Correct

B. ∠BAC = 90° - 62°= 28° ≠ 48°

  • Incorrect

C. 25/BC = tan 62° ⇒ BC = 25/tan 62° = 13.29 ≠ 18

  • Incorrect

D. cos(∠ACB) = 0 ⇒ cos 90° = 0

  • Correct

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