IB Mathematics AA HL - Popular Quizzes
Complex Numbers
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Question 1
[Maximum mark: 6]
Solve the equation , giving your answers in Cartesian form.
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Question 2
[Maximum mark: 6]
In this question give all angles in radians.
Let and .
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Find . [1]
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Find:
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;
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. [3]
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Find , the angle shown on the diagram below. [2]
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Question 3
[Maximum mark: 7]
The complex numbers and satisfy the equations
Find and in the form where .
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Question 4
[Maximum mark: 8]
Let .
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Write , and in the form where .
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Draw , and on an Argand diagram. [6]
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Find the smallest integer such that is a real number. [2]
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Question 5
[Maximum mark: 9]
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Find three distinct roots of the equation , , giving your answers in modulus-argument form. [6]
The roots are represented by the vertices of a triangle in an Argand diagram.
- Show that the area of the triangle is .
[3]
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Question 6
[Maximum mark: 15]
Consider where and .
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If ,
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write in the form ;
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find the value of . [5]
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Show that in general,
[4]
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Find condition under which . [2]
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State condition under which is:
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real;
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purely imaginary. [2]
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Find the modulus of given that . [2]
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Question 7
[Maximum mark: 22]
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Solve , for . [5]
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Show that . [3]
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Let , for , .
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Find the modulus and argument of in terms of .
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Hence find the fourth roots of in modulus-argument form. [14]
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