Matthew Soon's answer to A's Junior College 2 H2 Maths Singapore question.
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Remember for part (i),
When you have two perpendicular lines, the product of their gradients is -1.
i.e.
given y1= m1.x1 + c1 and y2= m2.x2 + c2 are perpendicular to each other,
m1 x m2 = -1
When you have two perpendicular lines, the product of their gradients is -1.
i.e.
given y1= m1.x1 + c1 and y2= m2.x2 + c2 are perpendicular to each other,
m1 x m2 = -1
Date Posted:
3 years ago
One more thing:
Always substitute the values of the coordinates (x,y) back into your answer to quickly check if you got it right
Always substitute the values of the coordinates (x,y) back into your answer to quickly check if you got it right
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