I am running a test where I start by preforming a calibration to fit the following linear line(adsbygoogle = window.adsbygoogle || []).push({});

V= a * X + b

where: X is Displacement, and V is Voltage reading.

Then, I acquire my data where I measure V and find X based on X = V/a ( the b drops down ), and find an angle Theta = X/f such that Theta = V/(a*f)

My questions is:

If I know that the uncertainty of the slope 'a' is

where

How can I find the uncertainty of Theta?

Thank you

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# Propogating error

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