Given v1=5i+2j and v2 =ai-6j are perpendicular to each other, determine the value of a.
Answers
Answered by
69
Answer:
cos 90⁰ = v1.v2/
0 = 5a - 12
a = 12/5
a = 2 . 4
Hope this helps you
Answered by
19
Answer:
12/5.
Explanation:
Since, the two vectors are perpendicular o each other hence there dot product will be zero so the dot product of the two vectors will be given as modulus of v1.v2 which will be 5a-12=0.
Thus, on solving we will get the value of a as 12/5. Since, there are only to vectors that are perpendicular hence we can find it by dot product and no λ is required.
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