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Calculus
Level 3
choose the correct option.
is equal to pi/2
is equal to pi/4
does not exist
none of these
Submit
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, interactive explorations.
Used and loved by over 5 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
Your answer
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That seems reasonable.
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