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What is true about the complex number -5 - 5i? Check all that apply?
A. The modulus is 5√2.
B. The modulus is 5.
C. It lies in quadrant 2.
D. It lies in quadrant 3.
1 AnswerMathematics8 years agoWhat value is the nth root of unity for any value n?
1 AnswerMathematics8 years agoWhich expression is a fourth root of -1 + i√3?
Which expression is a fourth root of -1 + i√3?
A. √2(cos(320º) + isin(320º))^(1/4)
B. √2(cos(30º) + isin(30º))^(1/4)
C. √2(cos(60º) + isin(60º))^(1/4)
D. √2(cos(280º) + isin(280º))^(1/4)
2 AnswersMathematics8 years agoFind the conjugate of the complex number. 7 - 3i?
3 AnswersMathematics8 years agoFind the quotient of the complex numbers. Express your answer in trigonometric form.?
Find the quotient of the complex numbers. Express your answer in trigonometric form.
(5(cos(15º) + i sin(15º)))/(3(cos(70º) + i sin(70º)))
1 AnswerMathematics8 years agoWhen a complex number z is written in its polar form, z = r (cos(theta) + i * sin(theta))...?
When a complex number z is written in its polar form, z = r (cos(theta) + i * sin(theta)) , the nonnegative number r is called the "magnitude" or _____ of z.
1 AnswerMathematics8 years agoFind the fourth roots of the complex number " z1 = 1 + √3 * i ".?
http://tinypic.com/r/2cmox3l/5
Part I: Write z1 in polar form.
Part II: Find the modulus of the roots of z1.
Part III: Find the four angles that define the fourth roots of the number z1.
Part IV: What are the fourth roots of the equation " z1 = 1 + √3 * i ".
1 AnswerMathematics8 years agoPlease & TY - Consider the vector " v = (-6, 13) ".?
Consider the vector
If the text below doesn't make sense, this link shows you the original problem!
Part I: Use the dot product to find the angle (in degrees) between " v = (-6, 13) " and the vector (1,0).
Part II: Writev in the form (l v l cosθl v l sinθ). Express the angle θ in degrees.
Part III: Use the dot product of the vectors " v = (-6, 13) " and " w = (-42, -34) " to determine if they are orthogonal.
2 AnswersMathematics8 years agoPLEASE AND TY = Use the sum identity for tangent to find the exact value of tan((17π)/12).?
Use the sum identity for tangent to find the exact value of tan((17π)/12).
Part I: Find two common angles that sum to ((17π)/12).
Part II: Evaluate the expression using the sum identity for tangent.
1 AnswerMathematics8 years agoGive the most general solutions to the equation below - PLEASE and THANKS?
2sinxcosx - sin(2x)cos(2x) = 0
Part I: Simplify the first expression using the double-angle identity for sine.
Part II: Factor the left side of the equation.
Part III: Solve the factored equation.
2 AnswersMathematics8 years agoGive the most general solutions to the equation below - PLEASE AND THANKS?
2sinxcosx - sin(2x)cos(2x) = 0
Part I: Simplify the first expression using the double-angle identity for sine.
Part II: Factor the left side of the equation.
Part III: Solve the factored equation.
1 AnswerHomework Help8 years agoPRECALCULUS QUESTIONS?
*Part III: Solve the problem for E, the energy released by the earthquake.*
2 AnswersMathematics8 years agoPrecalculus: tan(π/16) again...?
Can you please prove the statement below/on the link:
http://www.wolframalpha.com/input/?i=tan%28%CF%80%...
tan(π/16) = sqrt((2-sqrt(2+sqrt(2)))/(2+sqrt(2+sqrt(2))))
2 AnswersMathematics8 years agoPrecalculus: tan(π/16)?
Use the half angle formulas to come up with an exact expression for the function value above.
4 AnswersMathematics8 years agoGraph ((y+3)^2)/9 - ((x-2)^2)/16 = 1?
Graph ((y+3)^2)/9 - ((x-2)^2)/16 = 1?
Part I: Identify the coordinates of the center of this hyperbola.
Part II: Use the values of a and b to locate the coordinates of the vertices.
Part III: What are the coordinates of the foci?
Part IV: Graph this hyperbola using the graph shown below. Clearly label the locations of the foci and the vertices. You do not need to label their coordinates.
1 AnswerHomework Help8 years agoQUESTION FOR THE FOLLOWING ELLIPSE: (((x−2)^2)/36) + (((y+1)^2)/25) = 1?
* Identify the coordinates of the center of this ellipse.
* Use the values of a and b to locate the coordinate f the vertices.
* What are the coordinates of the foci?
1 AnswerMathematics8 years ago
