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Introduction to Trigonometry: Today's topic in the »Christian Spannagel« video: Trigonometry (sine, cosine, tangent).
spektrum.de/video/christian-spannagel-einfuehrung-in-trigonometrie/2335492

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Sine, Cosine, Tangent: Special Values: Today's topic in the »Christian Spannagel« video: Sine, cosine, tangent of 45°, 30° and 60°.
spektrum.de/video/christian-spannagel-sinus-kosinus-tangens-besondere-werte/2335754

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The Archimedean Spiral: Today's topic in the »Christian Spannagel« video: The Archimedean Spiral.
spektrum.de/video/christian-spannagel-die-archimedische-spirale/2335951

Proof using a tangent quadrilateral: Today's topic in the "Christian Spannagel" video: Proof using a tangent quadrilateral.
spektrum.de/video/christian-spannagel-beweis-im-tangentenviereck/2334531

Adding dice pips: Today's topic on "Christian Spannagel": Probability.
spektrum.de/video/christian-spannagel-wuerfelaugen-addieren/2333504

Amount of caffeine: Today's topic in the »Christian Spannagel« video: Functional relationships.
spektrum.de/video/christian-spannagel-koffeinmenge/2332866

Letter puzzle: Today's topic in the »Christian Spannagel« video: Combinatorics.
spektrum.de/video/christian-spannagel-buchstabenpuzzle/2329997

Incomplete Digits: Today's topic in the "Christian Spannagel" video: Divisibility.
spektrum.de/video/christian-spannagel-lueckenhafte-ziffern/2328189

Working backwards with GCD & LCM: Today's topic in the »Christian Spannagel« video: Divisibility.
spektrum.de/video/christian-spannagel-rueckwaerts-mit-ggt-und-kgv/2328186

Explain the connection: Today's topic in the "Christian Spannagel" video: Divisibility.
spektrum.de/video/christian-spannagel-begruende-den-zusammenhang/2327704

Set Puzzles & Venn Diagrams: Today's topic in the »Christian Spannagel« video: Set Theory.
spektrum.de/video/christian-spannagel-mengen-puzzle-und-venn-diagramme/2326684

Tasks in egg cartons: Today's topic in the »Christian Spannagel« video: Place value systems.
spektrum.de/video/christian-spannagel-aufgaben-in-eierkartons/2325649

Sack Race Competition: Today's topic in the »Christian Spannagel« video: Combinatorics.
spektrum.de/video/christian-spannagel-sackhuepfen-wettbewerb/2317870

Lots of result sets: Today's topic in the »Christian Spannagel« video: Set theory.
spektrum.de/video/christian-spannagel-jede-menge-ergebnismengen/2317265

The number sequence 5, -15, 45, -135, 405: How do you express a number sequence in recursive or closed form?
spektrum.de/video/christian-spannagel-die-zahlenfolge-5-15-45-135-405/2314130

The Euler line in GeoGebra: Today's topic in the »Christian Spannagel« video: We construct the Euler line in GeoGebra.
spektrum.de/video/christian-spannagel-die-euler-gerade-in-geogebra/2308322

What are exponential functions: Today's topic: Exponential functions
spektrum.de/video/christian-spannagel-was-sind-exponentialfunktionen/2307635

Higher eyes count: Today's topic: Chance and probabilities
spektrum.de/video/christian-spannagel-die-hoeheren-augen-zaehlen/2306564

Pentagram and hexagram: Angle sums at the vertices: Today's topic in the »Christian Spannagel« video: We calculate the angle sums of the vertices of a ...
spektrum.de/video/christian-spannagel-pentagramm-und-hexagramm-winkelsummen/2302219

Mulled wine functions: Today's topic: Functional relationships
spektrum.de/video/christian-spannagel-gluehwein-funktionen/2301892

Brainstorming on the topic of mental arithmetic: 🧑🏫Today's topic: Brainstorming on the topic of mental arithmetic
spektrum.de/video/christian-spannagel-brainstorming-zum-thema-kopfrechnen/2295683

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