We know that
`cos(arccos(-2/3)) = -2/3`
Therefore, using trig identities,
=> `sin = sqrt(1 - cos^2) = sqrt(1 - 4/9)`
=> `sin = sqrt(5/9) = sqrt(5)/3`
We have a Math tutor online right now to help you!
To chat with a tutor, please set up a tutoring profile by creating an account and setting up a payment method. If you initiate a chat, please note you will be charged $0.50 a minute for tutoring time.