Given sin θ = square root of 23 divided by 12 and tan θ = square root of 23 divided by 11, find cos θ. enter the answer as a fraction in lowest terms.

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?