" 3.The function "f(x)=(a sin x+b cos x)/(c sin x+d cos x)" is decreasing,if "

The function f(x)=(a sin x+b cos x)/(c sin x+d cos x) is decreasing,if (i) ad-bc>0 (ii) ad-bc 0 (ii) ab-dc<0

The function f(x) = sin x + cos x will be

If the function f(x) = (K sin x + 2 cos x)/(sin x + cos x) is strictly increasing for all values of x, then

The function f(x) = sin ^(-1)(cos x) is

If x in (0, pi//2) , then the function f(x) = x sin x + cos x + cos^(2) x is a)Increasing b)Decreasing c)Neither increasing nor decreasing d)None of these

The period of the function f(x)=( sin 8x cos x-sin 6x cos 3x )/(cos 2x cos x- sin 3x sin 4x ) is