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Description
Trigonometric DelightsA fun, entertaining exploration of the ideas and people behind the growth of trigonometry. Trigonometry has a reputation as a dry, difficult branch of mathematics, a glorified form of geometry complicated by tedious computation. In Trigonometric Delights, Eli Maor dispels this view. Rejecting the usual descriptions of sine, cosine, and their trigonometric relatives, he brings the subject to life in a compelling blend of history, biography, and
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 1843 reviews
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Product Reviews
★★★★★ 4
Ball obsession
Dog loves these but he is an aggressive chewer so once he gets a hold of that sweet spot ball has no chance..
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Reviewed in the United States on May 30, 2026
★★★★★ 5
My dogs favorite toy!
They can’t wait for me to put air in the ball. Second picture is my active dog asleep from having so much fun with her new soccer ball.
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Reviewed in the United States on May 9, 2026
★★★★★ 3
Just okay
This didn’t last a day. Not for a large dog. Just medium size or small dog.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Good size
Easy for the dog to grab one of the tabs. She likes playing with it outside.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
My boy love it
My dog's favorite toy. It's really the only thing that he will chase after. I keep buying a new one every year.
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Reviewed in the United States on April 23, 2026
