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  • 11-05-2016
  • Mathematics
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Complete the following statement: If sin(30)=½, then the cos( ___)=½.

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  • 11-05-2016
Sin A=Cos (90º-A)

Then:
sin 30º=cos (90º-30º)=Cos 60º=1/2

Answer: cos 60º=1/2
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