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Dividing AB squared plus BC squared equals AC squared by which term gives cos squared A plus sin squared A equals 1?
ABC squared
BAC halved
CAC squared
DAB squared
Answer & Solution
Correct answer: C. AC squared
1. Each term is divided by the same quantity.
2. Choosing the hypotenuse squared makes the right side 1.
3. So divide by AC squared.
_Source: NCERT Class 10 Mathematics, Chapter 8, Introduction to Trigonometry._
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