jee-main 2021 Q63

jee-main · India · session4_31aug_shift1 Solving quadratics and applications Finding roots or coefficients of a quadratic using Vieta's relations

$\operatorname { cosec } 18 ^ { \circ }$ is a root of the equation:
(1) $x ^ { 2 } - 2 x - 4 = 0$
(2) $4 x ^ { 2 } + 2 x - 1 = 0$
(3) $x ^ { 2 } + 2 x - 4 = 0$
(4) $x ^ { 2 } - 2 x + 4 = 0$

$\operatorname { cosec } 18 ^ { \circ }$ is a root of the equation:\\
(1) $x ^ { 2 } - 2 x - 4 = 0$\\
(2) $4 x ^ { 2 } + 2 x - 1 = 0$\\
(3) $x ^ { 2 } + 2 x - 4 = 0$\\
(4) $x ^ { 2 } - 2 x + 4 = 0$

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