`sec^(-1)[sec(-30^(@))]`=

(1+sec20^(@))(1+sec40^(@))(1+sec80^(@))=

Evaluate : (cos 45^(@))/(sec30^(@)+"cosec "30^(@))

Evaluate each of the following: sec^(-1)(sec(7pi)/3) (ii) sec^(-1)(sec(9pi)/5) (iii) sec^(-1){sec(-(7pi)/3)}

Write the values of sec 0^(@) ,sec 30^(@) , sec 45^(@) , sec 60^(@) and sec 90^(@) . What happens to sec x when x increases from 0^(@) "to "90^(@) ?

Write the values of sec0^(@), sec 30^(@), sec 45^(@), sec 60^(@) and sec 90^(@) . What happens to sec x when x increases from 0^(@) to 90^(@) ?

Evaluate each of the following: sec^(-1)((sec(13 pi))/(4))( ii) sec^(-1)((sec(25 pi))/(6))

Evaluate each of the following: sec^(-1)(sec(13pi)/4) (ii) sec^(-1)(sec(25pi)/6)

Evaluate each of the following: sec^(-1)((sec pi)/(3)) (ii) sec^(-1)((sec(2 pi))/(3))( iii) sec^(-1)((sec(5 pi))/(4))

Evaluate each of the following: sec^(-1)((sec(7 pi))/(3))( ii) sec^(-1)((sec(9 pi))/(5))( iii) sec^(-1){sec(-(7 pi)/(3))}

(tan60^(@)+sec60^(@)-1)/(tan60^(@)-sec60^(@)+1) A) sec30^(@)+2cos60^(@) B) csc30^(@)+2sin60^(@) C) cot30^(@)+2tan60^(@) D)none of these