Show method selection, derivation, conditions, units, verification, and interpretation.
U10 · L02
Name
Date
1
State the central method of Graphing Polar Curves & Symmetry Tests and list the conditions that must be checked.
Faculty solution: Use using key angles, sign, periodicity, and symmetry. State the relevant hypotheses, domain or interval, units when applicable, and a verification plan.
2
Identify r=2cosθ.
Faculty solution: A circle of radius 1 centered at (1,0).
3
How many petals does r=cos(3θ) have?
Faculty solution: 3 petals.
4
A learner makes an error by missing equivalent polar coordinates, the pole, or the one-half area factor. Explain the first invalid step and repair the reasoning.
Faculty solution: The first invalid step is missing equivalent polar coordinates, the pole, or the one-half area factor. Return to the governing definition or theorem, restore the missing condition, and verify the corrected result.
5
Create a short application of Graphing Polar Curves & Symmetry Tests in antenna patterns, orbital geometry, rotational design, navigation, and radial measurement. Define variables and identify the quantity an integral, differential equation, sequence, or series would measure.
Faculty solution: A defensible response defines variables and units, states assumptions, builds the correct mathematical object, and interprets its value in antenna patterns, orbital geometry, rotational design, navigation, and radial measurement.
6
Describe two independent ways to verify a result from Graphing Polar Curves & Symmetry Tests.
Faculty solution: Use an exact structural check such as differentiation, substitution, partial sums, or theorem hypotheses; then compare with numerical, graphical, dimensional, or limiting evidence.