Question

Please help me with trig: sec((5pi)/3)=?

Answer 1

\[\huge \sec\left(\frac{5\pi}{3}\right)=\frac{1}{\cos\left(\frac{5\pi}{3}\right)}\]

Answer 2

and cos 5pi/3 is sqrt2/2, right?

Answer 3

No, it isn't :)

Answer 4

that's what i saw on the trig circle. what is it?

Answer 5

Actually, it's 1/2 :)

Answer 6

that sounds better, but how do you figure?

Answer 7

bc when i use my calculator i get 2 as the answer

Answer 8

That's because it's COSINE that's 1/2
But you're asked for SECANT, which is 1/Cosine
^.^

Answer 9

yeah, i got that part.. i'm confused as to how cosine5pi/3 equals 1/2 and not sqrt2/2

Answer 10

nevermind! i was reading the spot next to it

Answer 11

thank you very much:)