Rules of Trig- Sine Cosine Rules

Question	Answer
What formulae do you use to find a side using the sine rule in any non right angled triangle?	\[\frac{a}{sinA}\=frac{b}{sinB}\=frac{c}{sinC}\]
What formulae do you use to find an angle using the sine rule in any non right angled triangle?	\[\frac{sinA}{a}\]=\[\frac{sinB}{b}\]=\[\frac{sinC}{c}\]
What formulae do you use to find a side using the cosine rule in any non right angled triangle?	\[a^2=b^2+c^2-2bcCosA\]
What formulae do you use to find a angle using the cosine rule in any non right angled triangle?	CosA=\[\frac{b^2+c^2-a^2}{2bc}\]
What do you need to find a side using the sine rule?	Need the angle opposite the side and another pair of side and angle
What do you need to find an angle using the sine rule?	Need the side opposite the angle and another pair of side and angle
What do you need to find a side using the Cosine rule?	Need the other 2 sides and the angle between them
What do you need to find an angle using the Cosine rule?	Need all 3 sides

Resource summary

	Created by maia.j.hughes almost 11 years ago