If x and y are real numbers such that `sin^2theta=(x^2+y^2)/(2xy)` show that `x=y`.

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 .

If x and y be real,then the equation sin^(2)theta=(x^(2)+y^(2))/(2xy) has solution

If x and y are real, show that the equation : sec^2 theta= (4xy)/(x+y)^2 is valid only when x = y ne 0 .

If x and y are real number such that x^2 +2xy-y^2=6 , find the minimum value of (x^2+y^2)^2

If x and y are real number such that x^(2)+2xy-y^(2)=6, find the minimum value of (x^(2)+y^(2))^(2)

If x and y be two positive real numbers such that 4x^(2)+y^(2)=40 and xy=6 , then find the value od 2x+y .

Show that sec^2theta=(4xy)/(x+y)^2 is possible only if x = y

If x.y,z are positive real numbers such that x^(2)+y^(2)+z^(2)=27, then x^(3)+y^(3)+z^(3) has

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