## Question

###### Suppose that a and b are nonzero vectors. (a) Under what circumstances is comp_ $\mathbf{b}=\mathrm{comp}_{\mathbf{b}}$ a? (b) Under what circumstances is proja $\mathbf{b}=$ proj $\mathbf{b}$ a?

Suppose that a and b are nonzero vectors. (a) Under what circumstances is comp_ $\mathbf{b}=\mathrm{comp}_{\mathbf{b}}$ a? (b) Under what circumstances is proja $\mathbf{b}=$ proj $\mathbf{b}$ a?

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