graceqt805 graceqt805
  • 21-04-2020
  • Mathematics
contestada

324=1409-1400cos(x)
What’s x equal ?

Respuesta :

jimrgrant1 jimrgrant1
  • 21-04-2020

Answer:

x ≈ 39.2°

Step-by-step explanation:

Given

324 = 1409 - 1400 cos x ( subtract 1409 from both sides )

-1085 = - 1400 cos x ( divide both sides by - 1400 )

0.775  = cos x, thus

x = [tex]cos^{-1}[/tex] (0.775) ≈ 39.2° ( to 1 dec. place )

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