In Example 4, change cos to sin. Data from Example 4 Plot the graph of r =
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In Example 4, change cos to sin.
Data from Example 4
Plot the graph of r = 2cos2θ.
In finding values of r, we must be careful first to multiply the values of θ by 2 before finding the cosine of the angle. Also, for this reason, we take values of θ as multiples of π/12, so as to get enough useful points. The table of values follows:
For values of θ starting with π, the values of θ repeat. We have a four-leaf rose, as shown in Fig. 21.115.
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Related Book For
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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