find the distance between two points A(cosa,sina)and B(sina,cosa)
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Answer:
we know that
distance b/w 2 points (x1,y1)(x2,y2)is√((x2-x1)²+(y2-y1)²)
= √(sina-cosa)²+(cosa-sina)²
=√sin²a+cos²a-2sinacosa+cos²a+sin²a+2sinacosa [sin²a+cosa = 1]
=√1+1=√2
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