Last updated at Aug. 11, 2021 by

Transcript

Misc 16 If ฮธ is the angle between two vectors ๐ โ and ๐ โ , then ๐ โ โ ๐ โ โฅ 0 only when (A) 0 < ๐< ๐/2 (B) 0 โค ๐ โค๐/2 (C) 0 < ๐ < ฯ (D) 0 โค๐ โค ๐ Given, ๐ โ. ๐ โ โฅ 0 |๐ โ | |๐ โ | cos ฮธ โฅ 0 Assuming |๐ โ | โ 0 and |๐ โ | โ 0 cos ฮธ โฅ 0/|๐ โ ||๐ โ | cos ฮธ โฅ 0 โด 0 โค ฮธ โค ๐/2 So, (B) is the correct answer

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About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.