barbosaa2525 barbosaa2525
  • 08-07-2020
  • Mathematics
contestada

I need some help on this

I need some help on this class=

Respuesta :

jt90846
jt90846 jt90846
  • 08-07-2020

Answer: The answer is B

Step-by-step explanation:

Answer Link
ronhagrid310
ronhagrid310 ronhagrid310
  • 08-07-2020

Answer:

Option B is correct

Step-by-step explanation:

cos (3pi/4) = -cos(pi - 3pi/4) = -cos(pi/4) = -sqrt(2)/2

=> Option B is correct

Answer Link

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