" If `tan35^(0)+cot37^(0)+tan325^(@)=x tan53^(0)+tan127^(0)` then `x=`

tan9^(0)-tan27^(0)-tan63^(@)+tan81^(@)

What is the value of ( cosec (78^(@) - theta) - sec ( 12^(@) + theta) - tan (67^(@) + theta) + cot (23^(@) - theta) )/( tan 13^(@) tan 37^(@) tan 45^(@) tan 53^(@) tan 77^(@) ) ?

Prove that : tan53^(@)=tan37^(@)+2 tan16^(@) .

log tan17^(@)+log tan37^(@)+log tan53^(@)+log tan73^(@)=

log tan17^(@)+log tan37^(@)+log tan53^(@)+log tan73^(@)=

tan225^(@)cot405^(@)+tan765^(@)cot675^(@)=0

Evaluate :tan7^(0)tan23^(@)tan60^(@)tan67^(0)tan83^(@)

Evaluate: tan35^(@)tan40^(@)tan45^(0)tan50^(@)tan55^(@)

Without using trigonometric tables,evaluate each of the following: (2)/(3)cos ec^(2)58^(@)-(2)/(3)cot58^(@)tan32^(@)-(5)/(3)tan13^(0)tan37^(0)tan45^(@)tan53^(@)tan77^(0)

If tan25^(0)=a, then the value of (tan205^(@)-tan115^(0))/(tan245^(0)+tan335^(@)) in terms of 'a' is