Evaluate the following: (i) `(tan35^@)/(cot55^@)+(cot78^@)/(tan12^@)-1` (ii) `(sec70^@)/(cos e c\ 20^@)+(sin59^@)/(cos31^@)`

Evaluate the following: (tan45^@)/(cos e c\ 30^@)+(sec60^@)/(cot45^@)-(5sin90^@)/(2cos0^@)

Evaluate the following: (i) (cot40^@)/(tan50^@)-1/2((cos35^@)/(sin55^@)) (ii) ((sin27^@)/(cos63^@))^2-((cos63^@)/(sin27^@))^2

Evaluate the following: (i) (sin21o)/(cos69o) (ii) (tan10o)/(cot80o) (iii) (sec11o)/(cos e c\ 79o)

Evaluate the following : (i) (sin58^(@))/(cos32^(@)) (ii) (sec42^(@))/("cosec"48^(@)) (iii) (tan37^(@))/(cot53^(@))

Evaluate : 2 (tan 57^(@))/(cot 33^(@))-(cot 70^(@))/(tan 20^(@))-sqrt(2)cos 45^(@)

Evaluate : 2 (tan 57^(@))/(cot 33^(@))-(cot 70^(@))/(tan 20^(@))-sqrt(2)cos 45^(@)

Evaluate the following: (i) cos e c\ 31^@-sec59^@ (ii) (sin72^@+cos18^@)(sin72^@-cos18^@)

Evaluate the following: (cos37^0)/(sin53^0) (ii) (tan54^0)/(cot36^0) (iv) (cos e c34^0)/(sec56^0)

Evaluate the following: (i) ((sin35)/(cos55))^2+((cos55)/(sin35))^2-2cos60 (ii) (2cos67)/(sin23)-(tan40)/(cot50)-cos0

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^(@))