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makkiz [27]
3 years ago
8

REALLY NEED HELP!!! see picture*****

Mathematics
1 answer:
vladimir1956 [14]3 years ago
5 0

Answer:

11) r=4

12) z_3+z_1=A

13a) \bar z_1=3-2i and \bar z_2=-5+3i

13b)  \bar {z_1z_2}=-9-19i

Step-by-step explanation:

11. The given equation in rectangular coordinates is x^2+y^2=16

To convert to polar form, use the relation x^2+y^2=r^2

This implies that:

\implies r^2=16

r=\sqrt{16}

r=4

In polar coordinates, r=4 is a circle with radius 4 units.

12.  From the diagram;

z_3=-3-3i

z_2=1+i

z_1=4+i

A=1-2i

We can see that two arrows are moving in anticlockwise direction to meet A which is moving in the clockwise direction;

\implies (-3-3i)+(4+i)=1-2i

\therefore z_3+z_1=A

13. The conjugate of the complex number: z=a+bi is \bar z=a-bi

Part a) The given complex numbers are:

z_1=3+2i and z_2=-5-3i

The conjugates of these complex numbers are:

\bar z_1=3-2i and \bar z_2=-5+3i

Part b) The product of z_1=3+2i and z_2=-5-3i is

z_1z_2=(3+2i)(-5-3i)

z_1z_2=-15-9i-10i-6i^2

z_1z_2=-9-19i

The conjugate of the product is:

\bar {z_1z_2}=-9-19i

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