Without using trigonometric tables , evaluate :
(i) `(sin11^(@))/(cos79^(@))`
(ii)`(sec15^(@))/("cosec"75^(@))`
(iii) `(tan54^(@))/(cot36^(@))`
(iv)` (cos68^(@))/(sin22^(@))`
(v) `("cosec"24^(@))/(sec66^(@))`
(vi) `(cot18^(@))/(tan72^(@))`