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JEE Mains 26-July-2022 Shift 1 Solved Paper

Section: Mathematics
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Question : 15 of 90
 
Marks: +1, -0
Let
→
a
=α
^
i
+
^
j
−
^
k
 and
→
b
=2
^
i
+
^
j
−α
^
k
,α>0. If the projection of
→
a
×
→
b
 on the vector −
^
i
+2
^
j
−2
^
k
 is 30 , then α is equal to :
[26-Jul-2022-Shift-1]
Validate
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