MathDB
Math Prize 2021 Problem 17

Source:

September 19, 2021
Math Prize for Girls

Problem Statement

In the coordinate plane, let A=(8,0)A = (-8, 0), B=(8,0)B = (8, 0), and C=(t,6)C = (t, 6). What is the maximum value of sinmCABsinmCBA\sin m\angle CAB \cdot \sin m\angle CBA, over all real numbers tt?