RADIANS() returns the radians of an angle that is expressed in degrees. Use RADIANS() if your angle is expressed in degrees and you want to convert the degrees to radians (particularly for later use with the SINE(), COSINE(), TANGENT(), ASINE(), ACOSINE() and ATANGENT() functions).
RADIANS(degrees)
RADIANS() returns the numeric radians from the measurement of a desired angle that is expressed in degrees.
Note: To round the result of the RADIAN() function, use the DECIMALS() function.
RADIANS(45) = 0.785398163397448
DEC(RADIANS(10),2)= 0.7854