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

  • question_answer
    If \[\cos \theta =\frac{7}{8}\] then value of \[\sec \theta =\]

    A) \[\frac{8}{7}\]

    B) \[\frac{7}{\sqrt{113}}\]

    C) \[\frac{8}{\sqrt{113}}\]

    D) \[1\]

    Correct Answer: A

    Solution :

    [a] \[\cos \theta =\frac{7}{8}\,\,\,\,\,\,\,\,\Rightarrow \,\,\,\,\,\,\,\,\,\sec \theta =\frac{1}{\cos \theta }=\frac{8}{7}\]


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