Let `cos^4x= acos(4x)+bcos(2x)+c` where `a,b,c` are constants then

If cos^(4)x is expressed in the form a cos4x+b cos2x+c where a,b and c are constants then the value of (a+b+c) ,is equal

Let f(x)=a+b|x|+c|x|^(2) , where a,b,c are real constants. The, f'(0) exists if

Let f(x)=a+b|x|+c|x|^(2) , where a,b,c are real constants. The, f'(0) exists if

The equation int_(-(pi)/(4))^((pi)/(4)){a|sin x|+(b sin x)/(1+cos^(2)x)+c}dx=0 where a,b,c are constants gives a relation between

Let f(x)=a+b|x|+c|x|^(4), where a,b, and c are real constants.Then,f(x) is differentiable at x=0, if a=0( b) b=0 (c) c=0( d) none of these

The equation int_(-pi//4)^(pi//4) {a|sin x|+(b sin x)/(1+cos x)+c}dx=0 where a,b,c are constants, gives a relation between

Let f(x)=a+b|x|+c|x|^(4), where a,b and c are real constants.Then,f(x) is differentiable at x=0, if a=0 (b) b=0( c) c=0(d) none of these

Let f(x)=a+b|x|+c|x|^4 , where a , ba n dc are real constants. Then, f(x) is differentiable at x=0, if a=0 (b) b=0 (c) c=0 (d) none of these