Question

why |p+q|=|r| if p+q+r=0 given​

Answer 1

degrees.

Inagine a right angled traingle sides PQR. One of the angle is 90 degress, which proves, other two sum equals 90 degrees.

Now, p and R are base and perpendicular respectively. Therefore, the angle between p and q being {x}

tangent of {x} = 1(given){P/R}

or 45 degrees.

Too simple to solve.