If `pi/4

sin(pi)/(4)*sin(3 pi)/(4)*sin(5 pi)/(4)*sin(7 pi)/(4)=

f(x)=min(sin x,cos x),x in(-pi,pi) the values of x where f(x) is non differentiable,is the set A. Then A is subset of (A) {(-3 pi)/(4),(-pi)/(4),(3 pi)/(4)}(B){(-pi)/(4),(pi)/(4),(3 pi)/(3)}(C){(-3 pi)/(4),(3 pi)/(4)}(D){(-3 pi)/(4),(pi)/(4),(pi)/(4),(3 pi)/(4)}

A solution of the equation cos^(2)theta+s int h eta+1=0 lies in the interval (-pi/4,pi/4) b.(pi/4,3 pi/4)c(3 pi/4,5 pi/4)d*(5 pi/4,7 pi/4)

The solution o the equation cos^(2)theta+s int h eta+1=0 lies in the interval (-pi/4,pi/4) b.(pi/4,3 pi/4)c(3 pi/4,5 pi/4)d.(5 pi/4,7 pi/4)

sin^(2)(pi)/(4)+sin^(2)(3 pi)/(4)+sin^(2)(5 pi)/(4)+sin^(2)(7 pi)/(4)=2

sin (pi/2) = 2 sin(pi/4) cos (pi/4)

int_(-pi//4) ^(pi//4) x^(3) sin^(4) xdx=

If (-pi)/(2) < theta < (pi)/(2) " and " theta ne pm (pi)/(4), then the value of cot ((pi)/(4) + theta) cot ((pi)/(4) - theta) is

Let y=y(x) be the solution of the differential equation, dy/dx+y tan x=2x+x^(2)tanx, x in(-pi/2,pi/2), such that y(0)= 1. Then (a) y'(pi/4)-y'(-pi/4)=pi-sqrt 2 (b) y'(pi/4)+y'(-pi/4)=-sqrt 2 (c) y(pi/4)+y(-pi/4)=-pi^(2)/2+2. (d) y(pi/4)-y(-pi/4)=sqrt 2