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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-5

  • question_answer
    \[{{\sin }^{2}}38{}^\circ +{{\cos }^{2}}38{}^\circ \]is equal to

    A)  \[\frac{1}{2}\]             

    B)  \[\sqrt{3}\]    

    C)  1                    

    D)  2

    Correct Answer: C

    Solution :

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


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