Question

If f=10π radians, simplify the expression cos^−1(tan f).

Answer 1

Explanation:

Every 2pi radians brigns you back to 0 pi so

10 pi radians is the same as 0 pi radians ...or zero

Tan (0) = sin (0) / cos(0) = 0/1 = 0

arcos (0) = pi/2 and 3pi/2