" (i) ञ2rienta "sos|i:cos(2x+3y)=(1)/(2);cos(3x+2y)=(sqrt(3))/(2)

(i) Solve: cos(2x + 3y)=1/2, cos(3x+2y) = sqrt(3)/2 (ii) If 0 lt x lt pi, 0 lt y lt pi and cosx + cosy - cos(x+y)=3/2 , prove that x=y=pi/3 .

If (cos x)/(cos y)=2 and cos(x-y)=(sqrt(3))/(2) then tan y=

Suppose that for some angles x and y the equations sin^(2)x+cos^(2)y=(3a)/(2) , cos^(2)x+sin^(2)y=(a^(2))/(2) hold simultaneously then the value of cos2x-cos2y equals (A) a (B) 2-a (C) 3a-2 (D) 2a-3

If (cos x)/(cos y)=2 and cos(x-y) = sqrt(3)/2 , then tan y=

If (cos x)/(cos y)=2 and cos(x-y)=(sqrt(3))/(2) then tan y=sqrt(alpha)-beta value of alpha-beta=

Find the value of cos^(-1)(x)+cos^(-1)((x)/(2)+(sqrt(3-3x^(2)))/(2))

Find the value of cos^(-1)(x)+cos^(-1)((x)/(2)+(sqrt(3-3x^(2)))/(2))

Solve the equation :sin(x-y)=(sqrt(3))/(2) and cos(x+y)=(1)/(2)