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

Which expression is equivalent to cos 150°? Our three choices are: A. cos 30° B. cos 330° C. cos (-30°) D. cos (-210°)
asked 158k views
5 votes
Which expression is equivalent to cos 150°?

Our three choices are:
A. cos 30°
B. cos 330°
C. cos (-30°)
D. cos (-210°)

asked
User Arunavkonwar
by
8.3k points

1 Answer

5 votes

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



Answer:D
answered
User Prabhat Yadav
by
8.3k points
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