Answer: Use vectors to prove that a parallelogram is a rectangle if and only if its
Chapter 10, Problem 80(choose chapter or problem)
Approximate Area Consider the circle \(r=3 \sin \theta\).
(a) Find the area of the circle.
(b) Complete the table giving the areas A of the sectors of the circle between \(\theta=0\) and the values of \(\theta\) in the table.
(c) Use the table in part (b) to approximate the values of \(\theta\) for which the sector of the circle composes \(\frac{1}{8}, \frac{1}{4}\), and \(\frac{1}{2}\) of the total area of the circle.
(d) Use a graphing utility to approximate, to two decimal places, the angles \(\theta\) for which the sector of the circle composes \(\frac{1}{8}, \frac{1}{4}\), and \(\frac{1}{2}\) of the total area of the circle.
Text Transcription:
r=3 sin theta
theta=0
theta
1/8, 1/4
1/2
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