Year 11 Maths - Specialist (Unit 1 and Unit 2)
Trigonometry
Sine and cosine rules in two and three dimensions
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Question 1
197659
In triangle \(ABC\), the sides \(a\), \(b\), \(c\) lie opposite angles \(A\), \(B\), \(C\). Which equation states the sine rule?
\(\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}\)
\(\dfrac{\sin A}{a^2}=\dfrac{\sin B}{b^2}=\dfrac{\sin C}{c^2}\)
\(a^2=b^2+c^2-2bc\cos A\)
\(\dfrac{a}{\cos A}=\dfrac{b}{\cos B}=\dfrac{c}{\cos C}\)
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