" The valomain of "cos^(-1)(x^(2)-4)

If cot^(4)x-cot^(2)x=1 , then the value of cos^(4)x+cos^(2)x is ________

If sin x + sin^(2) x= 1 , then the value of cos^(8) x - cos ^(4) x + 2cos^(2)x -1 is equal to :

STATEMENT-1: The solution set for cos ^(-1)(cos4)>3x^(2)-4x is phi. and STATEMENT-2: The value of cos^(-1)(cos x)=2 pi-x for x in(pi,2 pi)

If cos^(-1)(cos 4)gt3x^(2)-4x then

If cos^(-1)(cos 4)gt3x^(2)-4x then

Prove that 3cos^(-1)x=cos^(-1)(4x^(3)-3x),x in[(1)/(2),1]

If cos^(2)x+cos^(4)x=1 , then find the value of tan^(2)x+tan^(4)x .

Prove that: 3cos^(-1)x=cos^(-1)(4x^(3)-3x),x in[(1)/(2),1]

Prove : 3cos^(-1)x=cos^(-1)(4x^(3)-3x),x in[1/2,1]

cos^(-1)x-cos^(-1)(y/2)=alpha,x in[-1,1],y in[-2,2] then the value of 4x^(2)-4xy cos alpha+y^(2) is