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  3. 10th Class
  4. Mathematics
  5. Introduction to Trigonometry

10th Class Mathematics Introduction to Trigonometry Question Bank Introduction to Trigonometery

  • question_answer
    What is the value of \[\text{si}{{\text{n}}^{\text{2}}}\text{5}{}^\circ +\text{si}{{\text{n}}^{\text{2}}}\text{1}0{}^\circ +\text{si}{{\text{n}}^{\text{2}}}\text{8}0{}^\circ +\text{si}{{\text{n}}^{\text{2}}}\text{85}{}^\circ \]?

    A)  0                                            

    B)  1    

    C)  2                            

    D)         3

    Correct Answer: C

    Solution :

     \[\therefore \] \[={{2}^{2}}\times {{3}^{2}}\times 5\times 7\times 11\times 13=180180\] \[\therefore \]


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