Question

find the exact value of cos^-1 (0) without a calculator. I do not understand how to.

Answer 1

it is the same as this one: cos(x)=0
x=?

Answer 2

@chloe.pearson ,can u find x?

Answer 3

would it just be 1? I am confused as to how cos^-1 (0) is = to cosx=0

Answer 4

so in a similar question, sin^-1 (1), it would be sinx=1?
but I dont know where sinx=1

Answer 5

: To find cos-1 (0), it asks "what angle has cosine equal to 0

Answer 6

at 0 and pi?

Answer 7

cos or sin?

Answer 8

for cos?

Answer 9

no,can u draw a figure?

Answer 10

@chloe.pearson ,?

Answer 11

for cos^-1 0, would it be pi/2 +/- Npi?

Answer 12

pi/2 is right

Answer 13

and can u say the next one?

Answer 14

for sin?

Answer 15

no again for cos

Answer 16

or for cos, I think the next one would be 3pi/2

Answer 17

good

Answer 18

would sin^-1 (1) be pi/2?

Answer 19

yeah,u r right

Answer 20

awesome thankyou!

Answer 21

ur welcome