" If "x=log[cot(pi/4+theta)]," then "cosh x=

If x = log [ cot (pi/4 + theta )] then sinh x =

If x = log [ tan (pi/4 + theta/2 ) ] then cosh x =

If theta = (pi)/(6) and x = log [ cot (pi/(4) + theta)] , then sin h(x) =

If x=log_(e)[cot((pi)/(4)+theta)] then sin hx=

If theta in ((-pi)/(4), (pi)/(4)) and x=log_(e )[cot((pi)/(4)+theta)] then prove that (i) cosh x= sec 2theta" " (ii) sinh x=-tan 2theta

If : cot theta + cot((pi)/4 + theta) = 2 , then : theta =