Question
Write the smallest equivalence relation on the set A = {1, 2, 3}.
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$x+\frac{d^2 y}{d x^2}=\sqrt{1+\left(\frac{d^2 y}{d x^2}\right)^2}$
$5 \hat{i}+4 \hat{j}+3 \hat{k}$ and having direction ratios $-3,4,2$.
$\cos ^{-1}\left(\frac{e^x-e^{-x}}{e^x+e^{-x}}\right)$