A particle acted upon by a constant force 4î+ĵ-3k̂ N is displaced from point A with position vector î+2ĵ+3k̂ m to point B with position vector 5î+4ĵ+k̂ m. The w...

Let î, ĵ, and k̂ be the unit vectors in the x, y, and z directions, respectively. If the vector î + ĵ is rotated about positive k̂ by 135°, one gets

If â, b̂, and ĉ are three mutually perpendicular unit vectors, then â • (b̂ x ĉ) can take the value(s) _______.