Determine all values for a such that the vectors $\mathbf { x } = 2 \mathbf { i } + \mathbf { j } + 2 \mathbf { k }$ and $\mathbf { y } = \mathbf { i } + 2 \mathbf { j } + a \mathbf { k }$ will form a 60° angle.

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The Answer of Determine all values for a such that the vectors $\mathbf { x } = 2 \mathbf { i } + \mathbf { j } + 2 \mathbf { k }$ and $\mathbf { y } = \mathbf { i } + 2 \mathbf { j } + a \mathbf { k }$ will form a 60° angle.

Determine All Values for a Such That the Vectors x=2i+j+2k\mathbf { x } = 2 \mathbf { i } + \mathbf { j } + 2 \mathbf { k }x=2i+j+2k

Determine All Values for a Such That the Vectors $\mathbf { x } = 2 \mathbf { i } + \mathbf { j } + 2 \mathbf { k }$