
To calculate: To test for symmetry with respect to the line θ=π2 , the polar axis and the pole

Answer to Problem 17E
The polar equation is NOT symmetric with respect to the line θ=π2 and pole, while equation is symmetric with respect to polar axis
Explanation of Solution
Given information: Polar equation is r=21−cosθ
Formula Used:
Test for Symmetry:
To test symmetry with respect to the line θ=π2 , replace (r,θ) by (r,π−θ)
To test symmetry with respect to the polar axis, replace (r,θ) by (r,−θ)
To test symmetry with respect to the pole, replace (r,θ) by (r,π+θ)
Calculation:
Polar equation is given as follows:
r=21−cosθ
To test Symmetry respect with respect to the line θ=π2 :
Replacing (r,θ) by (r,π−θ) , polar equation is
r=21−cos(π−θ)r=21−(−cosθ)r=21+cosθ
Since above equation is not same as the given polar equation
Thus, polar equation is NOT symmetric with respect to the line θ=π2
To test Symmetry with respect to the polar axis
Replacing (r,θ) by (r,−θ) , polar equation is
r=21−cos(−θ)r=21−(cosθ)r=21−cosθ
Since above equation is same as the given polar equation
Thus, polar equation is symmetric with respect to the polar axis
To test Symmetry with respect to the pole
Replacing (r,θ) by (r,π+θ) , polar equation is
r=21−cos(π+θ)r=21−(−cosθ)r=21+cosθ
Since above equation is not same as the given polar equation
Thus, polar equation is NOT with respect to the pole
Conclusion:
Hence, polar equation is NOT symmetric with respect to the line θ=π2 and pole, while equation is symmetric with respect to polar axis
Chapter 9 Solutions
Precalculus with Limits: A Graphing Approach
- What is the particular solution to the differential equation y′′ + y = 1/cos t ?arrow_forwardWhich of the following is the general solution to y′′ + 4y = e^2t + 12 sin(2t) ?A. y(t) = c1 cos(2t) + c2 sin(2t) + 1/8 e^2t − 3t cos(2t)B. y(t) = c1e^2t + c2e^−2t + 1/4 te^2t − 3t cos(2t)C. y(t) = c1 + c2e^−4t + 1/12 te^2t − 3t cos(2t)D. y(t) = c1 cos(2t) + c2 sin(2t) + 1/8 e^2t + 3 sin(2t)E. None of the above. Please include all steps! Thank you!arrow_forwardShow that i cote +1 = cosec 20 tan 20+1 = sec² O २ cos² + sin 20 = 1 using pythagon's theoremarrow_forward
- Find the general solution to the differential equationarrow_forwardcharity savings Budget for May travel food Peter earned $700 during May. The graph shows how the money was used. What fraction was clothes? O Search Submit clothes leisurearrow_forwardExercise 11.3 A slope field is given for the equation y' = 4y+4. (a) Sketch the particular solution that corresponds to y(0) = −2 (b) Find the constant solution (c) For what initial conditions y(0) is the solution increasing? (d) For what initial conditions y(0) is the solution decreasing? (e) Verify these results using only the differential equation y' = 4y+4.arrow_forward
- Aphids are discovered in a pear orchard. The Department of Agriculture has determined that the population of aphids t hours after the orchard has been sprayed is approximated by N(t)=1800−3tln(0.17t)+t where 0<t≤1000. Step 1 of 2: Find N(63). Round to the nearest whole number.arrow_forward3. [-/3 Points] DETAILS MY NOTES SCALCET8 7.4.032. ASK YOUR TEACHER PRACTICE ANOTHER Evaluate the integral. X + 4x + 13 Need Help? Read It SUBMIT ANSWER dxarrow_forwardEvaluate the limit, and show your answer to 4 decimals if necessary. Iz² - y²z lim (x,y,z)>(9,6,4) xyz 1 -arrow_forward
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning





