If the scalar product of two unit vectors is one (i-i= 1), then both vectors will be

Explanation

The scalar product or dot product of two vectors is given by a · b = |a||b|cosθ, where θ is the angle between the vectors. If both vectors are unit vectors, |a| = |b| = 1. Therefore, the dot product simplifies to cosθ = 1, which implies θ = 0 degrees. This means the vectors are parallel and point in the same direction. Option A is correct. Option B is incorrect because vectors in any direction do not guarantee a dot product of 1. Option C is incorrect because antiparallel vectors have a dot product of -1. Option D is incorrect because perpendicular vectors have a dot product of 0.