`cos(x/2) = sqrt(2)/2.`
The general solution is:
`x/2 = +-arccos(sqrt(2)/2) + 2kpi,` `kinZZ.`
`arccos(sqrt(2)/2) = pi/4,` so the final answer is:
`x = +-pi/2+4kpi,` `kinZZ.`
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.