<h2>
Answer:</h2>
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<h2>
Step-by-step explanation:</h2>
<h3>1. Write the expression.</h3>
<h3>2. Substitute y for x, and x for y.</h3>
<h3>3. Solve for y.</h3>
<h3>4. Express your result.</h3>
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Area=rsquared(pi)
24/2=12(12)=144(pi)
Around 452.16
I hope that is correct.
First subtract 2 revolutions from the - 840 :- (- (840-720) = -120
This gives sin -120 which is in the 3rd quadrant of the unit circle
sin -120 = - sin 60 = - sqrt3/2