X is in Radian
TAN() with PI()mathematical constant PI() (π) value is 3.141593
We used ROUND() to show only two decimal places.
TAN() with RADIANS
SELECT TAN(RADIANS(0)); // Output is 0 SELECT TAN(RADIANS(45)); // Output is 1 SELECT TAN(RADIANS(90)); // Output is infinity or 1.63312393531954e+016 SELECT ROUND(TAN(RADIANS(180)),2); // Output is -0.00
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