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Question Number 95202 by mathocean1 last updated on 23/May/20

Commented by PRITHWISH SEN 2 last updated on 24/May/20

$$\mathrm{x}=2({2\cos }^2\theta -1)-1=2\cos 2\theta -1$$$$\therefore {(\mathrm{x}+1)}^2+{(\mathrm{y}-2)}^2=4...\left(\mathrm{i}\right)$$$$\mathbf{it}\mathbf{is}\mathbf{the}\mathbf{equation}\mathbf{of}\mathbf{a}\mathbf{circle}\mathbf{with}\mathbf{centre}\mathbf{at}(-1,2)$$$$\mathbf{and}\mathbf{a}\mathbf{radius}\mathbf{of}2\mathbf{units}$$$$\therefore \mathrm{E}\mathrm{be}\mathrm{the}\mathrm{set}\mathrm{of}\mathrm{all}\mathrm{points}\mathrm{satisfing}\mathrm{the}\mathrm{equation}$$$$\left(\mathbf{i}\right)$$$$\mathbf{please}\mathbf{check}.$$

Commented by mathocean1 last updated on 24/May/20

$$\mathrm{I}\mathrm{checked}...{\mathrm{it}}^{\prime }\mathrm{s}\mathrm{like}\mathrm{that}\mathrm{sir}...$$

Commented by mathocean1 last updated on 24/May/20

$$Thankyouverymuchsir.$$

Commented by PRITHWISH SEN 2 last updated on 24/May/20

$$\mathrm{welcome}$$

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