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Q.

Arun  is drawing a picture by standing. His height is 4 ft and length of his image is 43ft, then the angle of elevation is

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a

30°

b

45°

c

90°

d

60°

answer is A.

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Detailed Solution

Question Image

In ΔABC, AB=4 

AC=43ft

ACB=θ

And tanθ=ABAC

=443

tanθ=13

tanθ=tan30°

θ=30°

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