" 11."sin^(2)theta=((x+y)^(2))/(4xy)" is possible only,when "

Prove that sin^(2)theta=((x+y)^(2))/(4)xy is possible for real values of x and y only when x=y and x!=0.

If x and y be real, show that the equation : sin^2 theta= (x^2+y^2)/(2xy) is possible only when x =y ne 0 .

sin^(2) theta = ((x+y)^(2))/(4xy) is true if and only if

If x and y be real, show that the equation sec ^(2) theta=(4 xy)/((x+y)^(2)) is possible only when x=y

Show that sin^(2)theta=(x^(2)+y^(2))/(2xy) is possible for real value of x and y only when x=y!=0

Prove that the relation sin^(2)theta = (x+y)^(2)/4xy is not 4xy possible for any real theta where x in R , y in R such that |x | ne ly| .

If x and y are two positive real numbers (x ne y) , prove that cos^(2) theta = ((x+y)^(2))/(4 xy) is not possible.

Show that the relation sec^2 theta = (4xy)/(x+y)^2 is possible, only when x=y.