Question 67Asked in BPSC TRE 1.0 (2023) Mathematics Class 11-12

The value of the determinant |1 x y|सारणिक

The value of the determinant |1 x y| |0 cos x sin y| |0 sin x cos y| is
सारणिक |1 x y| |0 cos x sin y| |0 sin x cos y| का मान है
  1. Asin(x + y)sin(x + y)
  2. Bsin(x − y)sin(x − y)
  3. Ccos(x + y)cos(x + y)
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (C) cos(x + y)cos(x + y)

Explanation

Expanding along the first column gives 1·(cos x cos y − sin x sin y) = cos(x + y).पहले स्तम्भ के अनुदिश प्रसरण करने पर 1·(cos x cos y − sin x sin y) = cos(x + y) मिलता है।

From BPSC TRE 1.0 (2023) Mathematics Class 11-12 — Previous Year Paper

This is question 67 of BPSC TRE 1.0 (2023) Mathematics Class 11-12 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.