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sveticcg [70]
3 years ago
9

Find the value of the expression.

Mathematics
1 answer:
Jlenok [28]3 years ago
5 0

Answer:

according to your question it should be 3.00x 10^18 which is not a choice

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Find the product of z1 and z2, where z1 = 7(cos 40° + i sin 40°) and z2 = 6(cos 145° + i sin 145°).
Oduvanchick [21]
For two complex numbers z_1=re^{i\theta}=r(\cos\theta+i\sin\theta) and z_2=se^{i\varphi}=s(\cos\varphi+i\sin\varphi), the product is

z_1z_2=rse^{i(\theta+\varphi)}=rs(\cos(\theta+\varphi)+i\sin(\theta+\varphi))

That is, you multiply the moduli and add the arguments. You have z_1=7e^{i40^\circ} and z_2=6e^{i145^\circ}, so the product is

z_1z_2=7\times6(\cos(40^\circ+145^\circ)+i\sin(40^\circ+145^\circ)=42(\cos185^\circ+i\sin185^\circ)=42e^{i185^\circ}
3 0
3 years ago
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Sever21 [200]

Answer:

-12

Step-by-step explanation:

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8 0
3 years ago
PLEASE HELP! BRAINLIEST! AND EXTRA POINTS
Rom4ik [11]

Answer:

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8 0
2 years ago
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Answer:

Step-by-step explanation:

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Show Your Work:
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5 0
3 years ago
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