Introducing Trigonometry. 30 º Hypotenuse Adjacent Opposite.

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Presentation transcript:

Introducing Trigonometry

30 º Hypotenuse Adjacent Opposite

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

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

TriangleHypotenuseOppositeO / HAngle xSin x

TriangleHypotenuseOppositeO / HAngle xSin x

53.2 º Hypotenuse Adjacent Opposite

TriangleHypotenuseAdjacent A / HAngle xCos x

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