If `2x` and `2y` are complementary angles and `tan (x+2y)=2`, then which of the following is (are) correct ?

If tan^2 y cosec^2 x – 1 = tan^2 y , then which one of the following is correct ?

If x,y,z, are in A.P. and x^(2),y^(2),z^(2) are in H.P., then which of the following is correct ?

If x,y,z, are in A.P. and x^(2),y^(2),z^(2) are in H.P., then which of the following is correct ?

x+y=2 and x-y= 2 are tangents on a parabola at (1,1) and (4,2) respectivley. Which of the followings is/are correct.

If sintheta = (x^(2) - y^(2))/(x^(2) + y^(2)) , then which one of the following is correct?

If the angles (2x-10)^@ and (x-5)^@ are complementary angles. Find x.

If the angles (2x-10)^@ and (x-5)^@ are complementary angles, find x.

Let x,y an z be positive real numbers. Suppose x, y and z are the length of the sides of triangle opposite ot its angles, X,Y and Z respectively.If "tan" (X)/(2)+"tan"(Z)/(2)=(2y)/(x+y+x) then which of the following statement is/are TURE ?

Circles x^(2) + y^(2) + 2x = 0 & x^(2) + y^(2) – 2x = 0 Now which of following is/are correct ?