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Year 11 (2026) Maths Extension 1 (2026) Further Trigonometry

Trigonometry in Three Dimensions

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Question 1
202743

A rectangular room has a horizontal floor \(ABCD\) with \(AB = 8\) m and \(BC = 6\) m. The four vertical edges are each \(4\) m high, and \(G\) is the top corner of the room directly above \(C\). Find the angle of elevation of \(G\) from the corner \(A\), to \(1\) decimal place.

\(\angle GAC=\) 
21.8
 \(^\circ\) (1 d.p) 2 marks

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