Elka and Tom are both studying for a Chapter 1 test by doing some sample problems. They have both used their calculators (in radian mode) to find an approximate value to four decimal places for sec 4π/11. Much to their dismay, they got different answers. Elka's answer was 2.4072 and Tom's was 1.0993.
a. Why did they have to use their calculators for this problem?
b. Which student is correct?
c. The stv dent with the wrong answer used an incorrect definition. What did the student input into the calculator to get the wrong answer?
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