((pi)/(4)-x)cos((pi)/(4)-y)-sin((pi)/(4)-x)sin((pi)/(4)-y)=sin(x+y)

cos((3pi)/4+x)-sin(pi/4-x)=?

cos(pi/4-A)cos(pi/4-B)-sin(pi/4-A)sin(pi/4-B)=sin(A+B)

Statement -1 The value of determinant |{:(sinpi,cos(x+(pi)/(4)),tan(-(pi)/(4))),(sin(x-(pi)/(4)),-cos((pi)/(2)),In((x)/(y))),(cot((pi)/(4)+x),In((y)/(x)),tan(pi)):}| is zero Statement -2 The value of skew -symetric determinat of odd order equals zero.

What is the value of cos(pi/4-x)cos(pi/4-y)-sin(pi/4-x)sin(pi/4-y)?

If x=sin((pi)/(3)+A)*cos((pi)/(3)+B) and y=cos((pi)/(3)+A)*sin ((pi)/(3)+B) then x-y=

Plot y=sin(x+(pi)/(4)) and y =sin(x-(pi)/(4)) .

Plot y=sin(x+(pi)/(4)) and y =sin(x-(pi)/(4)) .

Plot y=sin(x+(pi)/(4)) and y =sin(x-(pi)/(4)) .