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Sun crescents. (Sonnensicheln.) (German)
MNU J. 69, No. 5, 310-312 (2016).
Classification: M54 G44 G64
1
Stepladders ‒ instructions for use examined closely. (Leitern ‒ Gebrauchsanweisungen unter der Lupe.) (German)
Math. Lehren 33, No. 196, 50 (2016).
Classification: M53 G43 G63
2
How does a Spidercam move? A technical achievement inspiring not only football fans. (Wie bewegt sich eine Spider-Cam? Eine technische Errungenschaft, die nicht nur Fußballfans begeistert.) (German)
PM Prax. Math. Sch. 58, No. 69, 26-30 (2016).
Classification: M50 G70 U70 P50
3
How wide is the Weser? Using theodolites for trigonometric calculations. (Wie breit ist die Weser? Theodoliten für trigonometrische Berechnungen nutzen.) (German)
Mathematik 5 bis 10 35, 34-37 (2016).
Classification: G63 M53 D83 U63
4
From Measuring the World to the law of sines. Arousing interest through literary works. (Von der Vermessung der Welt zum Sinussatz. Interesse wecken durch literarische Werke.) (German)
Math. Lehren 33, No. 195, 34-36 (2016).
Classification: G63 D43 A33 D83
5
Putting the unit in pre-service secondary teachers’ unit circle. (English)
Educ. Stud. Math. 92, No. 2, 221-241 (2016); erratum ibid. 92, No. 2, 243 (2016).
Classification: G60 G40
6
The unit circle approach to the construction of the sine and cosine functions and their inverses: an application of APOS theory. (English)
J. Math. Behav. 43, 111-133 (2016).
Classification: C30 G60
7
Instructional decision making and agency of community college mathematics faculty. (English)
ZDM, Math. Educ. 48, No. 1-2, 199-212 (2016).
Classification: D40 C70
8
Rational sine, cosine and tangent of rational angles. (Seni, coseni e tangenti razionali di angoli razionali.) (Italian)
Archimede 67, No. 4, 164-168 (2015).
Classification: G60
9
Squaring yin and yang. (La quadrature du yin et du yang.) (French)
Quadrature 97, 12-14 (2015).
Classification: G40 G80
10
Students’ comparison of their trigonometric answers with the answers of a computer algebra system in terms of equivalence and correctness. (English)
Int. J. Technol. Math. Educ. 22, No. 3, 115-121 (2015).
Classification: U70 D50 G60
11
Among sum and product. A tail to the quiz Agorando 2. (Tra somma e prodotto. Una coda al quiz Agorando 2.) (Italian. English summary)
Boll. Docenti Mat. 70, 75-80 (2015).
Classification: G60 A20
12
Sum and difference formulas for cosine with two right triangles. (Som- en verschilformules van cosinus met twee rechthoekige driehoeken.) (Dutch)
Uitwiskeling 31, No. 1, 7 (2015).
Classification: G60
13
Geometry illuminated. An illustrated introduction to Euclidean and hyperbolic plane geometry. (English)
MAA Textbooks. Washington, DC: The Mathematical Association of America (MAA) (ISBN 978-1-93951-211-6/hbk; 978-1-61444-618-7/ebook). xvi, 543~p. (2015).
Classification: G45 G95 Reviewer: Victor Oxman (Haifa)
14
Why does a truck so often get stuck in our underpass? (English)
Consortium 109, 39-40 (2015).
Classification: G40 G60 M90
15
A geometric construction of $π$. II: Vièta’s formula. (Eine geometrische Konstruktion von $π$. II: Die Formel von Vièta.) (German)
Monoid 35, No. 124, 27-30 (2015).
Classification: F50 N50 G40
16
History of trigonometric instruments. (Histoire et instruments de la trigonométrie.) (French)
Losanges 30, 13-24 (2015).
Classification: A30 G60 U60
17
How can you measure velocities with a mobile camera? (Wie kann man mit einer Handykamera Geschwindigkeiten messen?) (German)
Mathematikunterricht 61, No. 5, 27-31 (2015).
Classification: M50
18
Angle between two vectors. Discovering a formula for angle calculation without using the law of cosines. (Winkel zwischen zwei Vektoren. Ohne Kosinussatz eine Formel zur Berechnung des Winkels entdecken.) (German)
PM Prax. Math. Sch. 57, No. 63, 36-38 (2015).
Classification: G74 G64 U74 D84
19
Visual-angle problem. (Sehwinkelproblem.) (German)
MNU, Math. Naturwiss. Unterr. 68, No. 5, 308-309 (2015).
Classification: G64 I44 M54
20
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