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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-21

  • question_answer
    \[\sin 60{}^\circ \cos 30{}^\circ +\cos 60{}^\circ \sin 30{}^\circ \]is equal to

    A)  \[\frac{3}{2}\] 

    B)         \[\frac{5}{2}\]

    C)  1        

    D)  2

    Correct Answer: C

    Solution :

    \[\sin 60{}^\circ \cos 30{}^\circ +\cos 60{}^\circ \sin 30{}^\circ \] \[=\frac{\sqrt{3}}{2}\times \frac{\sqrt{3}}{2}+\frac{1}{2}\times \frac{1}{2}\] \[=\left( \frac{3}{4}+\frac{1}{4} \right)=\frac{4}{4}=1\]


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