Question: Use the binormal vector defined by the equation B = T N. Find the unit tangent, unit normal, and binormal vectors for the curve

Use the binormal vector defined by the equation B = T × N.

Find the unit tangent, unit normal, and binormal vectors for the curve r(t) = cos ti + sin tj - k

at t = π/4. Sketch the curve together with these three mutual orthogonal unit vectors.

r(t) = cos ti + sin tj - k

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