3 years ago

What does f(3)= ? Please help answer me

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

6 0

Answer:

Step-by-step explanation:

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Use the chain rule:

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Find z1z2 if z1 = 2/5(cos63° + isin63°) and z2 = 10/3(cos117° + isin117°).

Airida [17]

Answer:

-10/3 is the answer

Step-by-step explanation:

Given are two complex numbers as

$z1=\frac{2}{5} (cos63 + isin63)\\z2=\frac{10}{3} (cos 117 + isin117})$

Recall Demoivre theorem as

(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)

Hence here we have sum of angles as

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$z1z2=\frac{2}{5} \frac{10}{3} (cos180+isin180)$

= $\frac{-10}{3}$

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Step-by-step explanation:

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14 more than the prouduct of the three and nine

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