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2.10 Sine


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Last updated 26 October 2012 15:30 by NZTecAdmin

The sine of an angle is the ratio between the length of the side opposite the angle and the hypotenuse. We’ve established that for a 30° angle that ratio is 1:2.

In other words, if the side opposite 30° is 1m, the hypotenuse must be 2 m long.

Side Opposite 30° 1 m
hypotenuse 2 m

If the side opposite 30° is 2.5 m then the hypotenuse must be 5 m.

Side Opposite 30° 1 m 2.5 m
hypotenuse 2 m 5 m

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