find the distance between the points (a cos 45, 0)and (0, a cos 45)
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A (a cos 45,0) , B (0, a cos 45)
AB = ✓[(a cos 45-0)²+(0- a cos 45)²]
AB = ✓[a² *cos²45 +a² *cos²45]
AB = ✓[2 (a² *cos²45)]
AB = a cos 45✓2
AB = a * 1/✓2*✓2
AB = a units
AB = ✓[(a cos 45-0)²+(0- a cos 45)²]
AB = ✓[a² *cos²45 +a² *cos²45]
AB = ✓[2 (a² *cos²45)]
AB = a cos 45✓2
AB = a * 1/✓2*✓2
AB = a units
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