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1crissy 1crissy
  • 31-03-2014
  • Mathematics
Answered

Which expression is equivalent to cos 150°?

Our three choices are:

Acos 30°
Bcos 330°
Ccos (-30°)
Dcos (-210°)

Verified Answer :

Anonymous Anonymous
  • 31-03-2014

\(cos150^o=cos(150^o-360^o)=cos(-210^o)\)


\(Answer:D\)

Answer Link

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