adalinebravo adalinebravo

29-03-2020
Mathematics

contestada

What is the product of z1 and z2 if
z1 = 7[cos(-70°) + i sin(-70°)] and z2 = 44(cos115° + i sin115°)?

Respuesta :

amna04352 amna04352

30-03-2020

Answer:

308[cos(45) + isin(45)]

Step-by-step explanation:

z1×z2:

Modulus: r1 × r2

= 7×44 = 308

Argument: theta1 + theta2

= -70 + 115 = 45

z1z2 = 308[cos(45) + isin(45)]

Or

z1z2 = 154sqrt(2) + (i)154sqrt(2)

sqrt: square root

Answer Link

claikyn claikyn

25-02-2021

Answer: a

Step-by-step explanation: edge 2021

Answer Link

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