https://justintaft.com https://oneupsecurity.com
user: jtaft
484 karma | created 8 years ago
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Trick for doing trigonometry mentally [video]
(youtube.com)
2 pts|2 years ago|discuss
2 years ago|discuss
Using a Watch as a Compass
(possiblywrong.wordpress.com)
19 pts|2 years ago|3 comments
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