If `vec(A)` and `vec(B)` are perpendicular Vectors and vector `vec(A)= 5hat(i)+7hat(j)-3hat(k)` and `vec(B)= 2hat(i)+2hat(j)-ahat(k)`. The value of `a` isA. -2B. 8C. 7D. -8

If `vec(A)` and `vec(B)` are perpendicular Vectors and vector `vec(A)=

1.	If `vec(A)` and `vec(B)` are perpendicular Vectors and vector `vec(A)= 5hat(i)+7hat(j)-3hat(k)` and `vec(B)= 2hat(i)+2hat(j)-ahat(k)`. The value of `a` isA. -2B. 8C. 7D. -8
Answer» Correct Answer - D For perpendicular vector `vec(A).vec(B)=0` `implies (5hat(i)+7hat(j)-3hat(k)).(2hat(i)+2hat(j)-ahat(k))=0` `implies 10+14+3a=0 implies a= -8`

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If `vec(A)` and `vec(B)` are perpendicular Vectors and vector `vec(A)= 5hat(i)+7hat(j)-3hat(k)` and `vec(B)= 2hat(i)+2hat(j)-ahat(k)`. The value of `a` isA. -2B. 8C. 7D. -8

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