Example 13 - Chapter 10 Class 12 Vector Algebra
Last updated at December 16, 2024 by Teachoo
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Example 13 Find the angle between two vectors š ā and š ā with magnitudes 1 and 2 respectively and when š ā ā š ā =1. "Given |" š ā"| = 1 , |" š ā"| = 2 , " "and " š ā". " š ā" = 1" We know that š ā . š ā = "|" š ā"|" "|" š ā"|" cos Īø where Īø is the angle between š ā and š ā Putting values in formula š ā . š ā = "|" š ā"|" "|" š ā"|" cos Īø 1 = 1 Ć 2 Ć cos Īø cos Īø = 1/2 cos Īø = cos š /š So, Īø = š /š Thus angle b/w š ā and š ā is š/3 .
