How do i know if i need to use sin, cos, or tan?

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

Aphrase is shown read the phrase and give me the answer

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.