Pamanang Pang Medisina
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Find the cosine function that is represented in the graph.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.