(cos^(4)x-sin^(4)x)" is equal to "

The value of log_(sin^(2)x+cos^(4)x+2)(cos^(2)x+sin^(4)x+2) is equal to

lim_(x to oo)(sin^(4)x-sin^(2)x+1)/(cos^(4)x-cos^(2)x+1) is equal to

lim_(xtooo) (sin^(4)x-sin^(2)x+1)/(cos^(4)x-cos^(2)x+1) is equal to

The value of the definite integral int_(-(pi)/(4))^((pi)/(4)) (dx)/((1+e^(x cos x))(sin^(4)x +cos^(4)x)) is equal to

underset(x rarr0) Iim (sin^(2)(pi cos^(4)x)/(x^(4))) is equal to .

The value of log_((sin^2x+cos^4x+4))(cos^2x+sin^4x+4) is equal to

int(sin^(4)x)/(sin^(4)x+cos^(4)x)dx is equal to

int(sin^(4))/(sin^(4)x+cos^(4)x)dx is equal to

If 2sin x-cos2x=1 ,then (cos^(2)x+cos^(4)x+4)/(2) is equal to