(tan225^(@)-cot81^(@)cot69^(@))/(cot261^(@)+tan21^(0))=

(tan25^(@)-cot81^(@)cot69^(@))/(cot216^(@)+tan21^(0))=

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

Find the value of (cot25^(@)+cot55^(@))/(tan25^(@)+tan55^(@))+(cot55^(@)+cot100^(@))/(tan55^(@)+tan100^(@))+(cot100^(@)+cot25^(@))/(tan100^(@)+tan25^(@))

Find the value of (cot 25^(@)+cot 55^(@))/(tan 25^(@)+tan55^(@))+(cot 55^(@)+cot 100^(@))/(tan 55^(@)+tan 100^(@))+(cot 100^(@)+cot 25^(@))/(tan 100^(@)+tan 25^(@))

Evaluate each of the following: cot12^(@)cot38^(@)cot52^(@)cot60^(@)cot78^(@)tan5^(@)tan25^(@)tan30^(@)tan65^(@)tan85^(@)

Prove that: tan(-225^(@))cot(-405^(@))-tan(-765^(@))cot(675^(@))=0

cot12^(@)*cot 24^(@)*cot28^(@)*cot32^(@)*cot48^(@)*cot88^(@)=…….. i) tan45 ii) 2tan15.tan45.tan75 iii) 2tan15.tan45.tan75 iv) tan15.tan45.tan75

(tan40^(@)+tan20^(@))/(tan225^(@)-cot50^(@)cot70^(@))=(i)sqrt(3)(ii)(1)/(sqrt(3))(iii)1(iv)0

(1- tan 2 ^(@) cot 62^(@))/(tan 152^(@) -cot 88^(@))=

(1- tan 2 ^(@) cot 62^(@))/(tan 152^(@) -cot 88^(@))=