Q. Express z1=3[cos(60∘)+isin(60∘)] in rectangular form.Express your answer in exact terms.z1=□
Identify trigonometric form: Identify the trigonometric form of the complex number.The given complex number is in trigonometric form: z1=3[cos(60°)+isin(60°)]. To convert it to rectangular form, we need to evaluate the cosine and sine functions.
Evaluate cosine and sine: Evaluate the cosine and sine of 60 degrees.Cosine and sine of 60 degrees are known values:cos(60∘)=21sin(60∘)=23
Substitute values into trigonometric form: Substitute the values of cosine and sine into the trigonometric form. z1=3[21+i(23)]
Distribute coefficient: Distribute the coefficient 3 to both the real and imaginary parts.z1=3×(21)+3×i(23)z1=(23)+(233)i
Write final answer in rectangular form: Write the final answer in rectangular form.The rectangular form of the complex number is z1=23+233i.
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