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  • Youtube Cool math puzzle (folding paper)

  • Youtube Trigonometry lesson 4 - Sine rule. Lesson 1-3 click here

  • Youtube Degrees, minutes, seconds angle conversion demonstration / explanation

  • Youtube Trigonometry lesson 5 - Finding the Area of a triangle without perpendicular height

  • Youtube Trigonometry lesson 6 - Cosine rule

  • Youtube 3D Trigonometry Practice Question

  • Youtube Bearing, Cosine rule, Sine rule problem solving question

  • Youtube Trigonometry Lesson 7 - Radians

  • Youtube Trigonometry Lesson 8 - Unit circle construction in Geogebra

  • Youtube Trigonometry Lesson 9 - Definition of sine and cosine using the unit circle

  • Youtube Trigonometry Lesson 10 - sine and cosine of angles bigger than 90 degrees

  • Youtube Trigonometry Lesson 11 - The four quadrants

  • Youtube Trigonometry lesson 12 - exact values

  • Youtube Trigonometry lesson 13 - Symmetry

  • Youtube Trigonometry lesson 14 - radians, exact values, symmetry

  • Youtube Trigonometry lesson 15 - Solving trigonometric equations

  • Youtube Trigonometry lesson 16 - Solving trigonometric equations using exact values

  • Youtube Trig identity proofs: sin(A+B) = sinAcosB + cosAsinB

  • Youtube Trig identity proofs: cos(A+B) = cosAcosB - sinAsinB

  • Youtube Pythagorean Trig Identity proofs

  • Youtube Proving Trig Identities practice question 1

  • Youtube Proving Trig Identities practice question 2

  • Youtube Proving Trig Identities practice question 3

  • Youtube Trigonometric graphs lesson 1 - how to draw the sine wave

  • Youtube Trigonometric graphs lesson 2 - cosine curve, domain, range, period

  • Youtube Trigonometric graphs lesson 3 - Amplitude, vertical dilation

  • Youtube Trigonometric graphs lesson 4 - Calculating the period / horizontal dilation

  • Youtube Trigonometric graphs lesson 5 - Vertical translation

  • Youtube Trigonometric graphs lesson 6 - Horizontal translation part 1

  • Youtube Trigonometric graphs lesson 7 - Horizontal translation followed by horizontal dilation, general form

  • Youtube Trigonometric graphs lesson 8 - modelling real life situations

  • Youtube Easy way to solve any trigonometric equation with TI-84 plus

  • There are 32 videos in this category.