Without using trigonometric tables, evaluate :
(i) `(cos 53^@)/(sin 37^@)`
(ii) ` (tan68^@)/(cot 22^@)`
(iii)`(sec49^@)/(cosec 41^@)`
(iv) `(sin 30^@17')/(cos 59^@43')`

(sin30^(@)17)/(cos59^(@)43)

Without using Trigonometric tables, evaluate:- 2(cos67^@)/(sin23^@)-(tan 40^@)/(cot50^@)-sin90^@ .

Without using trigonometric tables, evaluate : (i) (sin16^@)/(cos 74^@) (ii) (sec 11^@)/(cosec 79^@) (iii) (tan 27^@)/(cot 63^@) (iv) (cos 35^@)/(sin 55^@) (v) (cosec 42^@)/(sec 48^@) (vi) (cot 38^@)/(tan 52^@)

Without using Trigonometric tables, evaluate:- 2(sin43^@)/(cos47^@)-(cot30^@)/(tan60^@)-sqrt2 sin45^@ .

Without using Trigonometric tables, evaluate:- (cos^2 20^@+cos^2 70^@)/(sin^2 59^@+sin^2 31^@) .

Without using Trigonometric Tables evaluate the following :- (2cos38^@)/(sin52^@)+(4tan40^@)/(cot50^@)+(12sec66^@)/(cosec24^@)

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^(@))

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^(@))

Without using trigonometric tables , evaluate : (i) (sin40^(@))/(cos50^(@))+(3tan50^(@))/(cot40^(@)) (ii) (sec37^(@))/("cosec "53^(@))-(tan20^(@))/(cot70^(@)) (iii) (cos74^(@))/(sin16^(@))+(sin12^(@))/(cos78^(@))-sin18^(@)sec72^(@) (iv) sin35^(@)sec55^(@)+(4sec32^(@))/("cosec "58^(@))

Without using trigonometric tables , evaluate : (i) (sin40^(@))/(cos50^(@))+(3tan50^(@))/(cot40^(@)) (ii) (sec37^(@))/("cosec "53^(@))-(tan20^(@))/(cot70^(@)) (iii) (cos74^(@))/(sin16^(@))+(sin12^(@))/(cos78^(@))-sin18^(@)sec72^(@) (iv) sin35^(@)sec55^(@)+(4sec32^(@))/("cosec "58^(@))