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108.10 Proof without words: ${\rm{tan }}{\pi\over {{\rm{12}}}}{\rm{=2 - }}\sqrt 3 {\rm{, tan }}{{{\rm{5}}\pi } \over {{\rm{12}}}}{\rm{=2 + }}\sqrt {\rm{3}} $

Published online by Cambridge University Press:  15 February 2024

Martin Lukarevski
Martin Lukarevski*
Affiliation:
Department of Mathematics and Statistics, University ”Goce Delcev” - Stip, North Macedonia e-mail: [email protected]
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Information
The Mathematical Gazette , Volume 108 , Issue 571 , March 2024 , pp. 143 - 144
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Copyright
© The Authors, 2024 Published by Cambridge University Press on behalf of The Mathematical Association

References

Garcia Capitan, F. J., Proof without Words: tangents 15 and 17 degrees, Coll. Math. J. 48:1 (2017) p. 35.Google Scholar
Stephenson, P., Feedback: On what makes a good Proof without Words, Math. Gaz. 107 (March 2023) p. 165.CrossRefGoogle Scholar
Nick, Lord, Feedback, Math. Gaz. 107 (July 2023) p. 356.CrossRefGoogle Scholar
Leversha, G., What makes a good Proof without Words, Math. Gaz. 105 (July 2021) pp. 271–281.CrossRefGoogle Scholar