tag:blogger.com,1999:blog-5834886388752215525.post4613090173935568474..comments2023-04-07T00:43:58.631-07:00Comments on Math Ed Blog from Bruce Yoshiwara: Cosine of 72 degrees (and constructing a regular pentagon)Bruce Yoshiwarahttp://www.blogger.com/profile/11735941402933510186noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-5834886388752215525.post-44924761978267937232014-08-31T16:56:35.097-07:002014-08-31T16:56:35.097-07:00This method of evaluating cos(2pi/5) was shown to ...This method of evaluating cos(2pi/5) was shown to me by my then-UCLA office mate Larry Miller in my first year of grad school.Bruce Yoshiwarahttps://www.blogger.com/profile/11735941402933510186noreply@blogger.com