A) \[30{}^\circ \]
B) \[60{}^\circ \]
C) \[45{}^\circ \]
D) None of these
Correct Answer: C
Solution :
In \[\Delta ABD\], \[\angle D=90{}^\circ\] |
\[\tan A=\frac{BD}{AD}\] |
\[\tan A=\frac{4}{4}=1\] |
\[\angle A=45{}^\circ\] \[\left[ \because \tan {{45}^{{}^\circ }}=1 \right]\] |
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