differentiation

Question: The angle between curves ${{y}^{2}}=4x$ and ${{x}^{2}}+{{y}^{2}}=5$ at (1, 2) is



1) ${{\tan }^{-1}}(3)$
2) ${{\tan }^{-1}}(2)$
3) $\frac{\pi }{2}$
4) $\frac{\pi }{4}$
Solution: Explanation: No Explanation
Tangent and Normal

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