`sin^2 x + 2 sin x cos x - 3cos^2 x = 0` if (i) `tanx=3` (ii) `tanx=-1` (iii)` x=npi+pi/4 ,n in I` (iv) `x=npi+tan^(-1)(3), nin I`

sin^(2) x+2sin x cos x-3cos^(2) x = 0 if (i) tan x = 3 (ii) tan x = -1 (iii) x = n pi+(pi)/(4) , n in I (iv) x = n pi+tan^(-1) (3), n in I

5sin^(2)x+sqrt(3)sin x cos x+6cos^(2)x=5 if (A)tan x=-(1)/(sqrt(3))(C)x=n pi+(pi)/(2),n in I(B)sin x=0(D)x=n pi+(pi)/(6),n in I

(i) 4cos^(2)x=1 (ii) 4sin^(2)x-3=0 (iii) tan^(2)x=1

sin x+sin2x+sin3x=cos x+cos2x+cos3x if (i)cos x=-(1)/(2)( ii) sin2x=cos2x (iii) x=n(pi)/(2)+(pi)/(8)( iv )x=2n pi+(2 pi)/(3)

The roots of the equation, cotx- cos x=1- cotx*cos x are : (i)npi+pi/4 (ii)2npi+pi/4 (iii)npi+pi/4 or 2npi+-pi (iv) (4n+1)pi/4 or(2n+1)pi; n in I

The general solution of the following equation : 2(sinx-cos2x)-sin2x)\ (1+2sinx)+2cosx=0 is/are x=2npi\ ;\ n in I (b) npi+(-1)^n(-pi/2);\ n in I x=npi+(-1)^npi/6;\ n in I x=npi+(-1)^npi/4;\ n in I

Which of the following set of values of x satisfies the equation 2^(2sin^2x-3sinx+1)+2^(2-2sin^2x+3sinx)=9? (a) x=npi+-pi/6,n in I (b) x=npi+-pi/3, n in I (c) x=npi,n in I (d) x=2npi+pi/2,n in I

Which of the following set of values of x satisfies the equation 2^(2sin^2x-3sinx+1)+2^(2-2sin^2x+3sinx)=9? (a) x=npi+-pi/6,n in I (b) x=npi+-pi/3, n in I (c) x=npi,n in I (d) x=2npi+pi/2,n in I

Which of the following set of values of x satisfies the equation 2^(2sin^2x-3sinx+1)+2^(2-2sin^2x+3sinx)=9? (a) x=npi+-pi/6,n in I (b) x=npi+-pi/3, n in I (c) x=npi,n in I (d) x=2npi+pi/2,n in I

If cos^2x+cos^2 2x+cos^2 3x=1 then (a) x=(2n+1)pi/4,\ n in I (b) x=(2n+1)pi/2,\ n in I (c) x=npi+-\ pi/6,\ n in I (d) none of these