Further Trigonometry: The sine sule

Subject: Mathematics

Qualification: GCSE

Section: Shape and Space

Source: BBC Bitesize

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The sine rule

(http://www.bbc.co.uk/schools/gcsebitesize/maths/images/figure_138abc.gif)

We can use the sine rule to find the size of an angle or length of a side.

The sine rule is:

(http://www.bbc.co.uk/schools/gcsebitesize/maths/images/furthertrigonometryhirev2_1.png)

or

(http://www.bbc.co.uk/schools/gcsebitesize/maths/images/furthertrigonometryhirev2.png) 

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We can use the sine rule when we are given:

(http://www.bbc.co.uk/schools/gcsebitesize/maths/images/figure_138.gif)

  • Two sides and an angle oppsote to one of the two sides

 (http://www.bbc.co.uk/schools/gcsebitesize/maths/images/figure_139.gif)

  • One side and any two angles
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Wow this is really helpful. I like the way you copied and pasted it from bbc bitesize.

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