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Sun crescents. (Sonnensicheln.) (German)
MNU J. 69, No. 5, 310-312 (2016).
Classification: M54 G44 G64
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1
Eureka math grade precalculus study guide. (English)
San Francisco, CA: Jossey-Bass/Wiley (ISBN 978-1-118-81200-6/pbk). 168~p. (2016).
Classification: B70 D30 F50 G70 G60 I20 K10
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2
Stepladders ‒ instructions for use examined closely. (Leitern ‒ Gebrauchsanweisungen unter der Lupe.) (German)
Math. Lehren 33, No. 196, 50 (2016).
Classification: M53 G43 G63
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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
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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
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5
Pythagoras with cosines. (Pythagoras met cosinussen.) (Dutch)
Euclides 91, No. 6, 18-19 (2016).
Classification: G60
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6
Erratum to: “Putting the unit in pre-service secondary teachers’ unit circle". (English)
Educ. Stud. Math. 92, No. 2, 243 (2016).
Classification: G60 G40
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7
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
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8
Sphere, cone, shearing, and stereographic projection. (Kugel, Kegel, Scherung und stereographische Projektion.) (German)
Mathematikinformation 64, 33-56 (2016).
Classification: G50 G60 G70 M50
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9
Challenging problems. Lots of ladders. (Uitdagende problemen. Ladderzat.) (Dutch)
Euclides 91, No. 4, 22-25 (2016).
Classification: G40 G60
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10
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
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11
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
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12
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
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13
The Brocard angle and a geometrical gem from Dmitriev and Dynkin. (English)
Am. Math. Mon. 122, No. 5, 495-499 (2015).
Classification: G65 G45 Reviewer: Faruk Abi-Khuzam (Beirut)
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14
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
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15
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
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16
Why does a truck so often get stuck in our underpass? (English)
Consortium 109, 39-40 (2015).
Classification: G40 G60 M90
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17
History of trigonometric instruments. (Histoire et instruments de la trigonométrie.) (French)
Losanges 30, 13-24 (2015).
Classification: A30 G60 U60
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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
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19
Cyclic evasion in the three bug problem. (English)
Am. Math. Mon. 122, No. 4, 377-380 (2015).
Classification: G65 G75 Reviewer: Hans-Peter Schröcker (Innsbruck)
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