Mathematics · 2020
JEE Main · 2 September 2020, Shift 2 · Q69
If the equation cos^4 θ+ sin^4 θ+λ=0 has real solutions for θ, then λ lies in the interval:
If the equation $\displaystyle \cos ^4 \theta+\sin ^4 \theta+\lambda=0$ has real solutions for $\displaystyle \theta$, then $\displaystyle \lambda$ lies in the interval :
Official answer
(2)
$\displaystyle \left[-1,-\frac{1}{2}\right]$
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.