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

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

  • question_answer
    If \[{{\sin }^{2}}A=1\], then the value of\[{{\sin }^{2}}A-{{\cos }^{2}}A\]is

    A) 1

    B) 0

    C) 2

    D) None of these

    Correct Answer: A

    Solution :

    We know that, \[{{\sin }^{2}}A+{{\cos }^{2}}A=1\] \[1+{{\cos }^{2}}A=1\] \[{{\cos }^{2}}A=0\] \[{{\sin }^{2}}A-{{\cos }^{2}}A=1-0=1\]


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