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UPSC NDA II 2011 Mathematics Paper
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© examsnet.com
Question : 40
Total: 120
What is the angle between two planes
2
x
−
y
+
z
=
4
and
x
+
y
+
2
z
=
6
?
π
2
π
3
π
4
π
6
Validate
Solution:
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