What is angle {A B D} ?

Correct Answer is : 15∘15^{}15∘

Correct Answer is : 15∘15^{}15∘

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UPSC NDA I 2011 Mathematics Paper

For the next four (4) items that follow:

A B C

is a triangle right angled at

B

. The hypotenuse

(A C)

is four times the perpendicular

(B D)

is four times the perpendicular

(B D)

drawn to its from the opposite vertex and

A D < D C

Question : 32 of 120

Marks: +1, -0

What is angle

\text{A B D}

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