kTatyaj3pentuli kTatyaj3pentuli
  • 11-11-2016
  • Mathematics
contestada

Which of these is equal to cos 47Á? A) cos 43Á B) sin 43Á C) tan 43Á D) cos 133Á

Respuesta :

pandamanog
pandamanog pandamanog
  • 17-11-2016
I believe the answer is B.
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alsteva alsteva
  • 18-11-2016
Correct answer is B.

[tex]\alpha+\beta=90^o \\ \cos{\alpha}=\sin{(90^o-\alpha)} \\ \cos{47^o}=\sin{(90^o-47^o)}=\sin{43^o}[/tex]
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