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y = 2 \cos^{- 1} x এ ব ং y = 2 \sin^{- 1} x

(- \frac{1}{\sqrt{2}}, \frac{π}{4})

(\frac{1}{\sqrt{2}}, \frac{π}{6})

(\frac{1}{\sqrt{2}}, \frac{π}{3})

(\frac{1}{\sqrt{2}}, \frac{π}{4})

(\frac{1}{\sqrt{2}}, \frac{π}{2})

ANS : 5

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