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WorksheetsWarm Up Grade 10 2
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
Where do we plot complex numbers?
a)
Cartesian Coordinate Plane
b)
Cartesian Complex Plane
c)
Euler's Plane
d)
Argand Diagram
2.
If z=x+yi, then the conjugate of z is
a)
y+xi
b)
y-xi
c)
-x+yi
d)
x-yi
3.
If z=3x+4i, what is |z|?
a)
-5
b)
25
c)
5
d)
-25
4.
If z=1+i is written in polar form, what would be its argument?
a)
sqrt 2
b)
45 degrees
c)
2
d)
x cis 90
5.
Solve for the modulus of z=6+7i
a)
sqrt 42
b)
sqrt 13
c)
sqrt (-1) or i
d)
sqrt 91
6.
1+i3
The polar form of this complex number is
a)
4 cis 60
b)
2 cis 60
c)
4 cis 30
d)
2 cis 30
7.
Which of the following is equal to sin (A+B)?
a)
cos A cos B - sin A sin B
b)
cos A cos B + sin A sin B
c)
cos A sin B - sin A cos B
d)
cos A sin B + sin A cos B
8.
Which of the following is equal to cos (A-B)?
a)
cos A cos B - sin A sin B
b)
cos A cos B + sin A sin B
c)
cos A sin B - sin A cos B
d)
cos A sin B + sin A cos B
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