Show that A^=2i^+3j^-4k^andB^=2i^+4j^+4k^ are perepedicular to each other
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Explanation:
A^. B^ =(2i^+3j^-4k^).(2i^+4j^+4k^ ) = 4 + 12 -16 = 0 = 6√29 cos∝
cos∝ = o , ∝ = 90°
Answered by
1
Explanation:
when the value of cos=90 (cos90=0)
A=2i+3j-4k
B=2i+4j+4k
the dot product of A and B
A.B=0
-2i+2i-3j+4j-4k+4k=0
since I,j,and k are showing direction we can neglect that
0i+1j-0k=0
the are =0
so they are perpendicular to each other
Hence prove
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