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

  • question_answer
    If m \[\tan \,30{}^\circ \]\[\cot \,60{}^\circ =\sin \,45{}^\circ \]\[\cos 45{}^\circ \], then the value of m will be

    A) \[\frac{1}{2}\]

    B) \[\frac{3}{2}\]

    C) \[\frac{1}{3}\]

    D) \[\frac{3}{4}\]

    Correct Answer: B

    Solution :

    \[m\,\tan \,30{}^\circ \cot \,60{}^\circ =\sin \,45{}^\circ \cos \,45{}^\circ \] \[m\times \frac{1}{\sqrt{3}}\times \frac{1}{\sqrt{3}}=\frac{1}{\sqrt{2}}\times \frac{1}{\sqrt{2}}\] \[\frac{m}{3}=\frac{1}{2}\] \[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\,m=\frac{3}{2}\]


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