दिइएको चित्रमा, 30 मिटर अग्लो एउटा स्तम्भ (AB) को टुप्पोबाट एउटा घर (CD) को छानाको अवनति कोण ( \(\angle HAC\) ) \(30^\circ\) छ । स्तम्भ र घरबिचको…
SEE Class 10 Compulsory Maths · 2081 · Solved Question with Answer
दिइएको चित्रमा, 30 मिटर अग्लो एउटा स्तम्भ (AB) को टुप्पोबाट एउटा घर (CD) को छानाको अवनति कोण (\(\angle HAC\)) \(30^\circ\) छ । स्तम्भ र घरबिचको दूरी \((BD) = 10\sqrt{3}\) मिटर छ ।
In the given figure, from the top of a tower (AB) 30 meter high, the angle of depression (\(\angle HAC\)) of the roof of a house (CD) is \(30^\circ\). The distance between tower and house \((BD) = 10\sqrt{3}\) meter.
[Figure: Tower AB 30m high, house CD, angle of depression HAC = 30 degrees, BD = 10 root 3 m, with points A, H at top, E, C at house roof level, B and D at ground]
(a) उन्नतांश कोणको परिभाषा लेख्नुहोस् ।
Write the definition of the angle of elevation.
(b) घरको छानोबाट स्तम्भको टुप्पोको उन्नतांश कोण कति हुन्छ ? लेख्नुहोस् ।
What is the angle of elevation of the top of the tower from the roof of the house? Write it.
(c) घरको उचाइ पत्ता लगाउनुहोस् ।
Find the height of the house.
(d) \(AE = EC\) भएको अवस्थामा \(\angle CAH\) को मान कति हुन्छ ? कारण दिनुहोस् ।
What is the value of \(\angle CAH\) when \(AE = EC\)? Give reason.