`cos^(-1) (cos 8pi/5)`

cos^(-1)(cos(5 pi/(3))+sin^(-1)(cos(5 pi/(3))=

cos^(-1)(cos(5 pi)/(3))=

cos^(-1) (cos ((5pi)/3))=

The value of cos[(1)/(2)cos^(-1)(cos(-(14 pi)/(5)))] is/are a.cos (-(7 pi)/(5)) b.sin((pi)/(10))ccos((2 pi)/(5))d.-cos((3 pi)/(5))

cos^(-1)(cos((5 pi)/(4)))

The value of cos^(-1 )(cos((33 pi) /(5))) is

cos^(-1)((cos(7 pi))/(5)) is equal to