Find (a), if a→=3i-2-4k^ and
B→ =ai^ + 2j^ - k^ are perpendicular
one another
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Answer:
x = 90°
We know that
A.B = AB cos x
A.B = AB cos 90°
A.B = AB * 0
A.B= 0
(2i-3j+4k).(ai+6j-8k)= 0
On solving, we get 2a-18-32=0
a = 25
Hope you understood
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