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JEE Main 25 July 2021 Shift 2 Solved Paper

Section: Mathematics
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Question : 85 of 90
 
Marks: +1, -0
If (
→
a
+3
→
b
) is perpendicular to (7
→
a
−5
→
b
) and(
→
a
−4
→
b
) is perpendicular to (7
→
a
−2
→
b
), then the angle between a and
→
b
 (in degrees) is ________.
[25 Jul 2021 Shift 2]
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