why |p+q|=|r| if p+q+r=0 given
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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.
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