Mathematics · 2021
JEE Main · 4 August 2021, Shift 2 · Q90
The number of real solutions of the equation |x^2+ sin x cos x, x(1+ sin x); x+ cos x, x+1| =0 is \ \ \ \.
The number of real solutions of the equation
$$\left|\begin{array}{cc}
x^2+\sin x \cos x & x(1+\sin x) \\
x+\cos x & x+1
\end{array}\right|=0
$$
is \_\_\_\_.
Official answer
3
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.