Question

arcsec (-1) ? pi?

Answer 1

Sec = 1/cos

Answer 2

arccos(-1) = pi

Answer 3

1/pi?

Answer 4

Not 1/pi but pi

Answer 5

\[
\text{arcsec}(-1) = x\implies \sec(x)=-1 \implies \cos(x) = -1\implies x=\pi+2\pi n
\]

Answer 6

Really? sec(x) = -1 where cos(x) = -1?

Answer 7

However to domain of \(\text{arcsec}\) is \([0,\pi]\)

Answer 8

So the only valid solution I guess is \(x=\pi\).

Answer 9

I meant to say image, not domain, but anyway.

Answer 10

\[
\sec(x) = -1\implies \cos(x)\sec(x) = -\cos(x) \implies 1=-\cos(x) \implies \cos(x)=-1
\]

Answer 11

Your formatting goes off the screen for me after 1 = -cos(x) -> cos(x) =...

Answer 12

Also I am doing this problem and I'm not getting the correct multiple choice answer I get 16.17

Answer 13

x = 12*cos(51)

Answer 14

what did you calculate?

Answer 15

Thanks bud. 7.55