jee-main 2022 Q65

jee-main · India · session1_27jun_shift2 Solving quadratics and applications Finding roots or coefficients of a quadratic using Vieta's relations

$\alpha = \sin 36 ^ { \circ }$ is a root of which of the following equation
(1) $16 x ^ { 4 } - 20 x ^ { 2 } + 5 = 0$
(2) $16 x ^ { 4 } + 20 x ^ { 2 } + 5 = 0$
(3) $10 x ^ { 4 } - 10 x ^ { 2 } - 5 = 0$
(4) $16 x ^ { 4 } - 10 x ^ { 2 } + 5 = 0$

$\alpha = \sin 36 ^ { \circ }$ is a root of which of the following equation\\
(1) $16 x ^ { 4 } - 20 x ^ { 2 } + 5 = 0$\\
(2) $16 x ^ { 4 } + 20 x ^ { 2 } + 5 = 0$\\
(3) $10 x ^ { 4 } - 10 x ^ { 2 } - 5 = 0$\\
(4) $16 x ^ { 4 } - 10 x ^ { 2 } + 5 = 0$

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