# trigonometry

### teacher overview

### teach-learn-practise

useful extra

teach-learn | practise-learn | timely practice | |

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2 | trigonometryTL2.pdf | trigonometry2.pdf | |

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4 | trigonometryTL4.pdf | trigonometry4.pdf | |

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### NC information

National curriculum code and descriptions (partially) covered by the layers.

know the formulae for:

- Pythagorasâ€™ theorem, a
^{2}+ b^{2}= c^{2}, - the trigonometric ratios,
- sinÎ¸ = opposite /hypotenuse ,
- cosÎ¸ = adjacent/hypotenuse and
- tanÎ¸ = opposite /adjacent ;

- apply them to find angles and lengths in right-angled triangles and, where possible, general triangles in two and three dimensional figures

know the exact values of sinÎ¸ and cosÎ¸ for Î¸ = 0^{o} , 30^{o} , 45^{o} , 60^{o} and 90^{o} ;

know the exact value of tanÎ¸ for Î¸ = 0^{o} , 30^{o} , 45^{o} and 60^{o}

know and apply the sine rule, and cosine rule, to find unknown lengths and angles

know and apply Area = 1/2 *ab*sinC to calculate the area, sides or angles of any triangle