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

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

cos^(-1)(cos(5 pi)/(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"((7pi)/(5)))=

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

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

Which of the following is/are the value of "cos"[1/2cos^(-1)(cos(-(14pi)/5)]? cos(-(7pi)/5) (b) sin(pi/(10)) cos((2pi)/5) (d) -cos((3pi)/5)

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

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