Given the for `a,b,c,d in R,` if a `sec(200^@)- ctan(200^@)=d and b sec(200^@)+d tan(200^@)= c,` then find the value of `((a^2+b^2+c^2+d^2)/(b d-a c))sin2 0^(@)`.

Given the for a,b,c,d in R, if a sec(200^(@))-c tan(200^(@))=d and b sec(200^(@))+d tan(200^(@))=c then find the value of ((a^(2)+b^(2)+c^(2)+d^(2))/(bd-ac))sin20^(@)

If a ,b ,c ,and d are in H.P., then find the value of (a^(-2)-d^-2)/(b^(-2)-c^-2) .

If a ,b ,c ,and d are in H.P., then find the value of (a^(-2)-d^-2)/(b^(-2)-c^-2) .

If a,b,c, and d are in H.P.then find the value of (a^(-2)-d^(2))/(b^(-2)-c^(2))

If a sec a-c tan a=d and b sec a+d tan a=c then

If a,b,c,d are distinct integers in an A.P. such that d=a^(2)+b^(2)+c^(2) , then find the value of a+b+c+d.

If a,b,c,d are distinct integers in an A.P. such that d=a^(2)+b^(2)+c^(2) , then find the value of a+b+c+d.

If a,b,c,d are distinct integers in an A.P. such that d=a^(2)+b^(2)+c^(2), then find the value of a+b+c+d

If a,b,c,d are the side of a quadrilateral, then find the the minimuym value of (a^(2)+b^(2)+c^(2))/(d ^(2))

If a,b,c,d are the side of a quadrilateral, then find the the minimuym value of (a^(2)+b^(2)+c^(2))/(d ^(2))