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Tan() function returns wrong value

I got a problem with some code, but can't find the error. I'm trying to calculate the distance marked in red on the sketch below.

My code return the value: -41.63

Correct value is: 3.75

My code:

return round(6.5 * tan(30),2);

Based on: http://php.net/manual/en/function.tan.php

I thought was was going to be a simple task, but i hit a wall - can't see the error. I hope some of you can point me in the right direction.

Thanks,

Kenneth

about 4 years ago · Santiago Trujillo

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Your current value is number of degrees and you need to convert this to radians first. Use deg2rad() function inside tan() to convert value from Degrees into Radians.

deg2rad(): Converts the number in degrees to the radian equivalent

about 4 years ago · Santiago Trujillo Denunciar

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Accepted Answer · 2022-06-14T19:26:55.657Z

The arg parameter is in radians.

tan()

You're sending the number of Degrees and the function expect Radians, so convert your value from Degrees to Radians first and you will get the expected result.

return round(6.5 * tan(deg2rad(30)),2);   //3.75

Fiddle

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Tan() function returns wrong value

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Andres GPT