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  5. Introduction to Trigonometry

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

  • question_answer
    The value of \[(\sin 30{}^\circ +\cos 30{}^\circ )-(\sin 60{}^\circ +\cos 60{}^\circ )\] is: (NCERT EXEMPLAR)

    A) \[-1\]

    B) 0

    C) \[1\]

    D) \[2\]

    Correct Answer: B

    Solution :

    [b] \[(\sin 30{}^\circ +\cos 30{}^\circ )-(\sin 60{}^\circ +\cos 60{}^\circ )\]
    \[=\left( \frac{1}{2}+\frac{\sqrt{3}}{2} \right)\,-\left( \frac{\sqrt{3}}{2}+\frac{1}{2} \right)=0\]


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