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]
Answer Link

Other Questions

List in the order the major blood vessels, chambers, and valves through which a drop of blood must pass in traveling from a vena cava
What is homeostasis?
Mr. Robinson has 20 students in his martial arts class. The ratio of boys to girls is 4:1. How many boys and girls are in Mr. Robinson's class?a. 15 boys, 5 gir
what did the comanche hunt
what is the measure of angle 2 ?
Absolute Location of Manitoba, Ellesnere Island, and Athabasca River?
Joe wanted to know more about how the cost of fertilizer for his lawn-care business was changing.  The cost of a bag of fertilizer just increased from $8 to $15
who was Cesar Chavez?
Keisha read twice as many books as Ben read. Subtracting 4 from the number of books Keisha read and dividing by 2 gives the number of books Sheldon read. Sheldo
Which scientific evidence would show that, for example two species of birds are closely related?