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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-1

  • question_answer
    If\[\sin \theta =0.7\], then\[\cos \theta ,\,\,0\le \theta <{{90}^{o}}\]is

    A) \[0.3\]                           

    B) \[\sqrt{0.49}\]

    C) \[\sqrt{0.51}\]     

    D)        \[\sqrt{0.9}\]

    Correct Answer: C

    Solution :

     \[\sin \theta =0.7\] \[\therefore \]\[\cos \theta \]             \[=\sqrt{1-{{\sin }^{2}}\theta }=\sqrt{1-{{(0.7)}^{2}}}\]             \[=\sqrt{1-0.49}=\sqrt{0.51}\]


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