Since a full rotation represents is 360° we find the percent 2.6° represents by using the rule of three:

Then:

Therefore, 2.6° represents 0.722% of a full rotation.
To find out how many radians does 2.6° is we also use the rule of three:

then:

Therefore 2.6° is 0.045 radians.
Now, if an angle has a mesuare of z degrees we use once again the rule of three to find how many radians it is:

Then:

Therefore the angle z is:

in radians.
To find the function we only use the result above, therefore we have:
