सिद्ध करें कि `tan9^(@)*tan27^(@)=cot63^(@)*cot81^(@)` .

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

tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=?

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

tan 9^(@) - tan 27^(@) - tan 63^(@) + tan 81^(@) =

Let the set of all a in R such that the equation cos2x+a sin x=2a-7 has a solution be [p,q] and r=tan9^(@)-tan27^(@)-(1)/(cot63^(@))+tan81^(@) ,then pqr is equal to

The value of tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@) is

the value of tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@) is equal to