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Year 11 (2026) Maths Advanced (2026) Trigonometry and Measure of Angles

Area Rule

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Question 1
202922

In \(\Delta ABC\), the side lengths \(a\), \(b\) and \(c\) are opposite the angles \(A\), \(B\) and \(C\) respectively. Which expression correctly gives the area of the triangle?

A.

\(\dfrac{1}{2}ab\sin C\)

B.

\(\dfrac{1}{2}ab\sin A\)

C.

\(\dfrac{1}{2}ab\sin B\)

D.

\(\dfrac{1}{2}ac\sin A\)

\(\dfrac{1}{2}ab\sin C\)

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