To sketch : the graph of the function including two full periods

Explanation of Solution
Given information: y=−3sin(6x+π)
Concept Involved:
Amplitude:
The constant factor a in y=asinx and y=acosx as a scaling factor − a vertical stretch or vertical shrink of the basic curve. When |a|>1, the basic curve is stretched, and when 0<|a|<1, the basic curve is shrunk. The result is that the graphs of y=asinx and y=acosx range between –a and a instead of between −1 and 1 . The absolute value of a is the amplitude of the function. The range of the function for a>0 is −a≤y≤a .
The amplitude of y=asinx and y=acosx represents half the distance between the maximum and the minimum values of the function and is given by Amplitude=|a| .
Period:
Let b be a positive real number.
The period y=asinbx and y=acosbx is given by Period=2π/b
Note that when 0<b<1, the period of y=asinbx is greater than 2π and represents a horizontal stretch of the basic curve. Similarly, when b>1, the period of y=asinbx is less than 2π and represents a horizontal shrink of the basic curve. These two statements are also true for y=acosbx . When b is negative, rewrite the function using the identify sin(−x)=−sinx or cos(−x)=cosx .
Horizontal Translation:
The constant c in the equation y=asin(bx−c) and y=acos(bx−c) results in horizontal translations (shifts) of the basics curves. For example, compare the graphs of y=asinbx & y=asin(bx−c) . The graph of y=asin(bx−c) completes one cycle from bx−c=0 to bx−c=2π . Solve for x to find that interval for one cycle is Left endpoint︷ c/b ≤x≤Right endpoint︷c/b + 2π/b ︸Period . This implies that the period of y=asin(bx−c) is 2π/b , and the graph of y=asinbx is shifted by an amount c/b . Phase Shift=c/b .
Vertical Translation:
The constant d in the equation y=asin(bx−c)+d and y=acos(bx−c)+d results in vertical translations of the basic curves. The shift is d units up for d>0 and d units down for d<0. In other words, the graph oscillates about the horizontal line y=d instead of about the x- axis.
Calculation:
Rewrite the given function y=−3sin(6x−(−π)) in the form y=asin(bx−c)+d
y=−3sin(6x−(−π))+0
Identify a, b, c, & d of our given function by comparing it with y=asin(bx−c)+d
a=−3 ; b=6 ; c=−π ; d=0
Identify Amplitude, Period, Phase shift {Horizontal Shift}, Vertical shift& mid-line
Amplitude is |a| | Period is 2π/b | Phase shift is c/b | Vertical Shift is d | Mid-line of function |
|−3|=3 | 2π6=π3 | cb=−π6 | d=0 | y=0 |
Graph:
Interpretation:
- The graph of the function y=−3sin(6x+π) has one complete cycle in the interval (−π/6, π/6) .
- It has a midline y=0, has amplitude as 3, maximum height of the function 3 andminimum height of the function is -3.
- Since a is negative, the function reflected over the x-axis.
- The start point {Left end} of the graph would be −π/6 & the end point of one complete cycle is π/6
Chapter 4 Solutions
EBK PRECALCULUS W/LIMITS
- 3. A spring is stretched 6 in. by a mass that weighs 8 lb. The mass is attached to a dashpot mechanism that has a damping constant of 0.25 lb-sec./ft. and is acted on by an external force of 4 cos 2t lb. a. Set-up the differential equation and initial value problem for the system. b. Write the function in phase-amplitude form. C. Determine the transient solution to the system. Show your work. d. Determine the steady state of this system. Show your work. e. Is the system underdamped, overdamped or critically damped? Explain what this means for the system.arrow_forward4. Suppose that you have a circuit with a resistance of 20, inductance of 14 H and a capacitance of 11 F. An EMF with equation of E(t) = 6 cos 4t supplies a continuous charge 60 to the circuit. Suppose that the q(0)= 8 V and the q'(0)=7. Use this information to answer the following questions a. Find the function that models the charge of this circuit. b. Is the circuit underdamped, overdamped or critically damped?arrow_forward1. Solve the initial value problem: y" -11y' + 30y = x³e6x y(0) 11, y'(0) = 36 =arrow_forward
- 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





