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Question 88Asked in BPSC TRE 3.0 (2024) Mathematics Class 9-10

If sin A + sin²A = 1, then cos²A + cos⁴A isअगर sin A + sin²A = 1, तो cos²A + cos⁴A का मान है

अगर sin A + sin²A = 1, तो cos²A + cos⁴A का मान है
  1. A11
  2. B–1–1
  3. C22
  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: (A) 11

Explanation

sin A = 1 − sin²A = cos²A. Then cos²A + cos⁴A = sin A + sin²A = 1.sin A = 1 − sin²A = cos²A; अतः cos²A + cos⁴A = sin A + sin²A = 1।

From BPSC TRE 3.0 (2024) Mathematics Class 9-10 — Previous Year Paper

This is question 88 of BPSC TRE 3.0 (2024) Mathematics Class 9-10 — 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.