Angle between two vectors ā = 2î + 2ĵ and b̄ = 4î - 4ĵ:
A180°
B90°
C45°
D0°
Answer & Solution
Correct answer: B. 90°
ā · b̄ = (2)(4) + (2)(-4) = 8 - 8 = 0. Hence vectors are PERPENDICULAR — angle 90°.
Related questions
The result a cross b is a:The area of a triangle from its three vertices can be found using:The area of a parallelogram with sides a and b uses the magnitude of their:For mutually perpendicular unit vectors, i cross j equals:The cross product of two nonzero vectors is zero when they are:The angle between two vectors can be found in terms of their:The vector product is an operation that is:The scalar product is an operation that is: