SOLUTION: Can someone please help me with this question? Using the x-and y-coordinates from the unit circle, evaluate the sec(pi/3). Answer options are: a.((sqrt.2)/(2)) b.(1/2) c.2 d.

Question 125458: Can someone please help me with this question?
Using the x-and y-coordinates from the unit circle, evaluate the sec(pi/3).
Answer options are:
a.((sqrt.2)/(2))
b.(1/2)
c.2
d.1
Please try and reply back to me as soon as possible, thank you!!!!!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
First write as . Looking at the unit circle, we can see that the angle (which is 60 degrees), lies on the unit circle at

. So this tells us that .

Start with the given expression

Plug in

Multiply the first fraction by the reciprocal of the second fraction

Multiply the fractions

So this means that which also means that

------------------------
Answer:

So which means that the answer is c)
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