`X^(+),Y^(2+)and Z` are isoelectronic with `CO_(2)` . Increasing order of protons in `X^(+),Y^(2+)` and Z is :

X^(+), Y^(2+) and Z^(-) ions are isoelectronic of CO_(2) . The sequence in number of protons in these ions will be

If X, Y, Z are the angles of a DeltaXYZ then prove that cos^(2)""(X)/(2)+cos^(2)((Y+Z)/(2))=1

If x + y = z then cos ^ (2) x + cos ^ (2) y + cos ^ (2) z-2cos x cos y cos z =

If tan "" (x-y)/( 2 ), tan z, tan "" (x + y)/( 2) are in G.P. then show that cos x = cos y. cos 2z

If x=r cos A cos B, y=rcosAsinB, z=rsin A then x^(2)+y^(2)+z^(2)=

cos x + cos y + cos z = 0 and sin x + sin y + sin z, then cos ^(2) (( x-y)/( 2)) =

In the sets of equations z^(x)=y^(2x),2^(z)=2.4^(x)x+y+z=16, the integral roots in the order x, y,z are :

The following steps are involved in finding the value of (a^(x+y))^(x-y)(a^(y+z))^(y-z)(a^(z+x))^(z-x) . Arrange them in sequantial order. (A) a^((x+y)(x-y).a^(y+z)(y-z).a^((z+x)(z-x)) (B) a^0=1 (C) a^(x^2-y^2).a^(y^2-z^2).a^(z^2-x^2) (D) a^(x^2-y^2+y^2-z^2+z^2-x^2)