"Suppose you have borrowed two calculators from friends, but you do not know whether they are set to workin radians or degrees. Thus you ask each calculator to evaluate cos 3.14. One calculator replies with an answer of -0.999999; the other calculator replies with an answer of 0.998499. Without further use of a calculator, how would you decide which calculator is using radians and which calculator is using degrees? Explain your answer."
note: This is direcly off my homework.