Question

Asked Feb 9, 2020

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Let r(t)=⟨sin(t),cos(t),9sin(t)+3cos(2t)⟩.

Find the projection of r(t)r(t) onto the xz-plane for −1≤x≤1.

Step 1

Set y=0 as the answer is asked for xz plane.

Step 2

Express z in terms of the sine terms only.

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