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Introducing Trigonometry

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30 º Hypotenuse Adjacent Opposite

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We use 3 functions Sine or SIN Cosine or COS Tangent or TAN

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Investigation To find a relationship between the 3 functions and the ratios of the lengths of a right angled triangle.

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TriangleHypotenuseOppositeO / HAngle xSin x 1 2 3 4 5

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TriangleHypotenuseOppositeO / HAngle xSin x 110 5 0.5 30 0.5 2 3 4 5

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53.2 º Hypotenuse Adjacent Opposite

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TriangleHypotenuseAdjacent A / HAngle xCos x 1 2 3 4 5

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Sin X = O / H Cos X= A / H Tan X = O / A

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Sine, Cosine, Tangent, The Height Problem. In Trigonometry, we have some basic trigonometric functions that we will use throughout the course and explore.

Sine, Cosine, Tangent, The Height Problem. In Trigonometry, we have some basic trigonometric functions that we will use throughout the course and explore.

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