perplexus.info :: Just Math : From geo to trigo

From geo to trigo (Posted on 2023-03-31)

Using pen and paper only and exploring a triangle with angles 72,72 and 36

Evaluate sin 9

Submitted by Ady TZIDON

No Rating

Solution: (Hide)

see Larry’s detailed solution

Comments: ( You must be logged in to post comments.)

Subject Author Date

p&p solution Larry 2023-03-31 16:21:21

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info