The value of `cos[1/2cos^(-1)cos((14)/3)]i s` `cos(2pi)/5` (b) `cos(-(7pi)/5)` `sinpi/(10)` (d) `-cos(3pi)/5`

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))

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)

The value of cos^(-1)(cos'(14pi)/(3)) is "…….."

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

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

The value of cos^(-1)(cos'(3pi)/(2)) is

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))

The value of cos(pi)/(5)cos.2(pi)/(5)cos4(pi)/(5)cos8(pi)/(5)=