Question
In Problems 43-54, write each expression in the standard form $a+b i$.$\left[4\left(\cos 40^{\circ}+i \sin 40^{\circ}\right)\right]^3$
Step 1
First, we can use the trigonometric identity $e^{i\theta} = \cos \theta + i \sin \theta$ to rewrite the expression inside the brackets as $4e^{i40^\circ}$. Show more…
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Write each expression in the standard form $a+b i$ $$ \left[4\left(\cos 40^{\circ}+i \sin 40^{\circ}\right)\right]^{3} $$
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