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junior college 2 | H2 Maths
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junior college 2 chevron_right H2 Maths chevron_right Singapore

Hi how do I do h and i, with steps thank you

Date Posted: 3 years ago
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Matthew Soon
Matthew Soon's answer
94 answers (Tutor Details)
1st
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
Matthew Soon
Matthew Soon
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