[," A) zero "," B) "1," C) "2,],[" m "," 28) The oxidation state of "," Co "," in "(" Co "(EDTA)]^(-1)" is "],[,," n "_(2)," C) "+1," D) "+2]

Th oxidation state of Co in [Co(EDTA)]^(-1) is

The derivative of cos^(-1) (2 x^2 -1) w.r.t. cos^(-1) x is ........... A) 2 B) -2 C) 0 D) 1

If A + B + C = 180^(@) , prove that cos A + cos B - cos C = -1 + 4 cos (A)/(2) cos"" (B)/(2) sin"" (C )/(2)

Prove that: (1+ cos (A-B) cos C)/(1+ cos (A-C) cos B) = (a^(2) +b^(2))/(a^(2) + c^(2))

Oxidation state of nitrogen is incorrectly given for M {:("Compound ","Oxidation State"),("a)" [Co(NH_3)_5Cl]Cl_2 ,-3),("b)" NH_2OH,-1),("c)" (N_2H_5)_2SO_4,+2),("d)" (Mg_(3))N_2,-3) :}

If sinx+cos e cx=2, then sin^n x+cos e c^n x is equal to 2 (b) 2^n (c) 2^(n-1) (d) 2^(n-2)

If sinx+cos e cx=2, then sin^n x+cos e c^n x is equal to 2 (b) 2^n (c) 2^(n-1) (d) 2^(n-2)

cos 1^(@) ."" cos 2^(@) ."" cos 3^(@) "…." cos 179 ^(@)= ................. A) 0 B) 1 C) -1/2 D) -1