119. You are sitting in a classroom next to the wall looking at the blackboard at the front of the room. The blackboard is 12 ft long and starts 3 ft from the wall you are sitting next to. a. Show that your viewing angle is if you are x ft from the front wall. α = arccot b. Find x so that a is as large as possible. 12' गैस्लेञ Blackboard x 15 Wall ·x arccot α X 3 You

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