Consider the circle r1t2 = 8a cos t, a sin t9, for 0 t 2p,
Chapter 11, Problem 78(choose chapter or problem)
Consider the circle r1t2 = 8a cos t, a sin t9, for 0 t 2p, where a is a positive real number. Compute r_ and show that it is orthogonal to r for all t. 7
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