Matthew Carpenter, age 10, has completed 642 inverse trigonometry problems at KhanAcademy.org.Photo: Joe Pugliese “This,” says Matthew Carpenter, “is my favorite exercise.” I peer over his shoulder at his laptop screen to see the math problem the fifth grader is pondering. It’s an inverse trigonometric function: cos-1(1) = ? Carpenter, a serious-faced 10-year-old wearing a gray T-shirt and an impressive black digital watch, pauses for a second, fidgets, then clicks on “0 degrees.” Presto: The computer tells him that he’s correct.
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Enter the radius square feet Enter the length of one side Enter the height of one side square feet Enter the length of one side square feet High School OGT Test Information, 9th, 10th Grade
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