1crissy 1crissy

31-03-2014
Mathematics

Answered

Which expression is equivalent to cos 150°?
Our three choices are:
A. cos 30°
B. cos 330°
C. cos (-30°)
D. cos (-210°)

Answer :

Аноним Аноним

31-03-2014

[tex]cos150^o=cos(150^o-360^o)=cos(-210^o)[/tex]

[tex]Answer:D[/tex]

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