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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
1
Pythagoras with cosines. (Pythagoras met cosinussen.) (Dutch)
Euclides 91, No. 6, 18-19 (2016).
Classification: G60
2
Erratum to: “Putting the unit in pre-service secondary teachers’ unit circle". (English)
Educ. Stud. Math. 92, No. 2, 243 (2016).
Classification: G60 G40
3
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
4
Sphere, cone, shearing, and stereographic projection. (Kugel, Kegel, Scherung und stereographische Projektion.) (German)
Mathematikinformation 64, 33-56 (2016).
Classification: G50 G60 G70 M50
5
Challenging problems. Lots of ladders. (Uitdagende problemen. Ladderzat.) (Dutch)
Euclides 91, No. 4, 22-25 (2016).
Classification: G40 G60
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
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
8
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
9
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
10
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
11
Why does a truck so often get stuck in our underpass? (English)
Consortium 109, 39-40 (2015).
Classification: G40 G60 M90
12
History of trigonometric instruments. (Histoire et instruments de la trigonométrie.) (French)
Losanges 30, 13-24 (2015).
Classification: A30 G60 U60
13
Deriving the sine function: differentials bring about understanding. (Die Sinusfunktion ableiten: Differenziale stiften Einsicht.) (German)
PM Prax. Math. Sch. 57, No. 64, 38-39 (2015).
Classification: I40 I20 G60 E50
14
On a geometry problem appeared in Gazeta Matematică. (Asupra unor probleme de geometrie apărute în Gazeta Matematică.) (Romanian)
Gaz. Mat., Ser. B 120, No. 3, 120-123 (2015).
Classification: G60
15
On Morley’s theorem. (În legătură cu teorema lui Morley.) (Romanian. English summary)
Gaz. Mat., Ser. B 120, No. 1, 1-8 (2015).
Classification: G60 G40
16
Proof without words: a trigonometric identity for $\sec x + \tan x$. (English)
Math. Mag. 88, No. 2, 151 (2015).
Classification: G60
17
A collinearity problem. (O problemă de coliniaritate.) (Romanian)
Gaz. Mat., Ser. B 120, No. 5, 242-247 (2015).
Classification: G40 G60
18
Validating affordances as an instrument for design and a priori analysis of didactical situations in mathematics. (English)
Int. J. Math. Teach. Learn. 2015, 23 p., electronic only (2015).
Classification: D40 G60 D20
19
New trigonometric identities from old. (English)
Math. Spectr. 47, No. 3, 128-132 (2015).
Classification: G60
20
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