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Find the area of the (i) circle x =a c...

Find the area of the
(i) circle x =a cos `theta` , ` y=a sin theta `
(ii) ellips `x=acos theta ,y=bsin theta ` by the method of integration

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The correct Answer is:
` (i) pia^(4) ` square units
` (ii) piab ` square units
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