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GCE O-Level A-Maths: Trigonometry Ratio of Special Angles using Fingers only!

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Published on May 19, 2012

tan 30, tan 45, tan 60 all via fingers only!
It's amazingly interesting!
Special credit: Darren Bobby Foo

For more O-Level A-Math tips, go to http://www.singaporeolevelmaths.com
Content of video is based on Singapore GCE O-Level Additional Mathematics syllabus (4047)

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