2. Questions Bank
  3. 10th Class
  4. Mathematics
  5. Introduction to Trigonometry

10th Class Mathematics Introduction to Trigonometry Question Bank Case Based MCQs - Introduction to Trigonometry

  • question_answer
    Measure of \[\angle A\] is

    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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