Question

find the value of sin^-1 0

a.-1
b.0
c.1
d.pi

Answer 1

HI!!

Answer 2

do you know a number whose sine is zero?

Answer 3

hey misty!!

Answer 4

what number (or angle) has sine zero?

Answer 5

i dont actually

Answer 6

oh you need a nice unit circle cheat sheet hold one

Answer 7

look at picture of the unit circle on the last page
then look at the points one the unit circle
the first coordinate is cosine, the second coordinate is sine

Answer 8

is it 90 degrees?

Answer 9

for example you can see that at \(\frac{\pi}{2}\) you have the point \((0,1)\) that means \[\cos(\frac{\pi}{2})=0\] and \[\sin(\frac{\pi}{2})=1\]

Answer 10

you want sine to be zero, not cosine, so no, it is not 90 degrees
you want the second number to be zero

Answer 11

righttt i see that now

Answer 12

also from your answer choices you are not working with degrees, you are working with radians

Answer 13

do you see it now?

Answer 14

yes i believe i do thanks

Answer 15

\[\color\magenta\heartsuit\]

Answer 16

oh be careful, there are lots of places it is zero

Answer 17

don't pick \(\pi\) that is not correct, pick \(0\)

Answer 18

yea i just notice that on the unit circle

Answer 19

ok imma go wit zero

Answer 20

for the inverse cosine your answer has to be between \(-\frac{\pi}{2}\) and \(\frac{\pi}{2}\)

Answer 21

yes, 0 is between those number, \(\pi\) is not

Answer 22

its correct to. thanks again misty :)