Question

evaluate arcsec(2)?

a) (pi/6, plus/minus 2pin, 5pi/6 plus/minus, 2pin
b) (pie/3)
c) (pie/6, 5pie/6)
d) (pie/3 plus or minus 2pien, 5pie/3 plus or minus 2pien)

Answer 1

arcsec(2)=x
sec(x)=2
cos(x)=1/2
x=arccos(1/2)
Definitely A.

Answer 2

or...input in a scientific calculator \(\mathsf{sec^{-1}x}\) i like that technique better

Answer 3

just change that x to 2

Answer 4

cos(x)=1/2 ---> x=pi/3

Answer 5

@blockcorlder, your solution is correct but the choice is b.