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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-12

  • question_answer
    \[{{\sin }^{2}}38{}^\circ +{{\cos }^{2}}38{}^\circ =?\]

    A)  \[\frac{1}{2}\]             

    B)  \[\sqrt{3}\]

    C)  1                    

    D)  1

    Correct Answer: C

    Solution :

    \[\because \] \[{{\sin }^{2}}38{}^\circ +{{\cos }^{2}}38{}^\circ \] \[={{\sin }^{2}}38{}^\circ +(1-{{\sin }^{2}}38{}^\circ )=1\]


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