`(sec37^(@))/(csc53^(@))=`

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^(@))

Evaluate the following: (cos37^(0))/(sin53^(0))( ii) (tan54^(@))/(cot36^(@)) (iv) (cos ec34^(0))/(sec56^(@))

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

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

What is ((sec18^(@))/(sec144^(@))+("cosec"18^(@))/("cosec"144^(@))) equal to ?

If cos37^(@)=(a)/(b) then , what is the valie of cosec 37^(@)-cos53^(@) ?

Without using trigonometric tables, evaIuate the following: sec37^@/(cosec53^@)+2cot15^@cot25^@cot45^@cot75^@cot65^@-3(sin^2 18^@+sin^2 72^@)

Evaluate : ( 3 cos 53^(@) cosec 37^(@))/(( cos^(2) 29^(@) + cos^(2) 61^(2))) - 3 tan ^(2) 45^(@)

csc(360^(@))/(7)+csc(540^(@))/(7)=csc(180^(@))/(7) (b) csc(90^(@))/(7)sec(180^(@))/(7)(d)sec(90^(@))/(7)