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Byju's Answer
Standard XII
Mathematics
Angle between Two Planes
If vector a∧+...
Question
If vector (a^+ 2b^) is perpendicular to vector (5a^ - 4 b^ ), then find the angle between a^ and b^>
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Solution
c.d = 0
5a
2
+ 6a.b - 8b
2
= 0
6a.b = 3
a.b = 1/2
angle between a and b is 60 degrees
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