hailluka hailluka
  • 03-04-2017
  • Mathematics
contestada

simplify cos(-1/3+-1/4)

Respuesta :

jozzy4
jozzy4 jozzy4
  • 03-04-2017
cod (-0.3-0.25)=
cos (-0.55)=0.45.
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ghanami
ghanami ghanami
  • 03-04-2017
hello :
cos(-π/3 -π/4)  =  cos(-  (π/3 +π/4)  ) = cos  (π/3 +π/4)  
                       = cos(π/3) cos(π/4) - sin(π/3) sin(π/4) 
                       = (1/2)(√(2)/2) - (√(3)/2)(√(2)/2)
                       =(√(2)-√(6)/)/4
Answer Link

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