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CBSE Class 12-science Answered

A vertical lamp-post of height 9 metres stands at the corner of a rectangular field. The angle of elevation of its top from the farthest corner is ,while from another corner it is . The area of the field isA vertical lamp-post of height 9 metres stands at the corner of a rectangular field. The angle of elevation of its top from the farthest corner is ,while from another corner it is . The area of the field is
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Asked by bhartiankita2002 | 04 Jul, 2020, 12:22: PM
answered-by-expert Expert Answer
T h e space l e n g t h space o f space t h e space s i d e space f r o m space w h i c h space t h e space a n g l e space i s space 45 to the power of 0 space i s space
tan 45 to the power of 0 equals 9 over y
y equals 9 m
T h e space l e n g t h space o f space t h e space s i d e space f r o m space w h i c h space t h e space a n g l e space i s space 30 to the power of 0 space i s
tan 30 to the power of 0 equals 9 over x
fraction numerator 1 over denominator square root of 3 end fraction equals 9 over x
x equals 9 square root of 3
A r e a space o f space t h e space f i e l d space equals x cross times y
equals 9 square root of 3 cross times 9 equals 81 square root of 3 m
Answered by Utkarsh Lokhande | 04 Jul, 2020, 11:03: PM
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