<?lab3
$x1 = 2.345;
$x2 = -4.914;
$x3 = 0.219;
$K = 1.601;
for ($i = 1; $i <= 3; $i++) {
if ($i === 1) {
$x = $x1;
} elseif ($i === 2) {
$x = $x2;
} else {
$x = $x3;
}
if ($x === 0) {
echo "Error: Division by zero!\n";
continue;
}
$a = arctan
(1 / $x) + arccos
(exp($x));
if (abs($a - $b) > pi / 2) { } elseif (abs($a - $b) === pi / 2) { $y = 1;
} else {
}
echo "x = $x\n";
echo "a = $a\n";
echo "b = $b\n";
echo "y = $y\n\n";
}
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