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A complex number zy has a magnitude 1211 = 2 and an angle 01 = 39º.-Express z, in rectangular form, as 21 = a + bi.Round a and b to the nearest thousandth.21+Show Calculator

A complex number zy has a magnitude 1211 = 2 and an angle 01 = 39º.-Express z, in-example-1
User Jleleu
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1 Answer

8 votes
8 votes

ANSWER

a = 1.554

b = 1.258


Z_1\text{ = }1.554\text{ + 1.258 i}

Step-by-step explanation

Step 1: Given that:


\text{ The absolute value or the modulus (r) = }|z_1|\text{ = 2}
\text{The argument of the complex number (}\theta)=39^0

Step 2: The rectangular form of a complex number is given by:


Z_1\text{ = a + bi}

Step 3: Using basic trigonometric ratios to determine a and b


\begin{gathered} \sin \text{ 39 = }(b)/(2) \\ b\text{ = 2 sin 39 = 1.258} \end{gathered}
\begin{gathered} \cos \text{ 39 = }(a)/(2) \\ a\text{ = 2 cos 39 = 1.554} \end{gathered}

Hence, the rectangular form of the complex number is:


Z_1\text{ = }1.554\text{ + 1.258i}

A complex number zy has a magnitude 1211 = 2 and an angle 01 = 39º.-Express z, in-example-1
User Lukegravitt
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