2. Questions Bank
  3. 10th Class
  4. Mathematics
  5. Introduction to Trigonometry

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

  • question_answer
    Find the value of the expression \[[\cos ec({{75}^{o}}+\theta )-\sec ({{15}^{o}}-\theta )-\]\[\tan ({{55}^{o}}+\theta )+\cot ({{35}^{o}}-\theta )]\]

    A)  - 1                                         

    B)  0   

    C)  1                                            

    D)  \[\frac{3}{2}\]

    Correct Answer: B

    Solution :

     \[\Rightarrow \] \[140\times 605=11\times L.C.M.\] \[\Rightarrow \] \[L.C.M.=\frac{140\times 605}{11}=7700\]


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