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secondary 3 | E Maths
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secondary 3 chevron_right E Maths chevron_right Singapore

Please help me with part a then the rest I am sure I can do on my own. Thanks in advance

Date Posted: 1 month ago
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Eric Nicholas K
Eric Nicholas K's answer
3855 answers (Tutor Details)
1st
tan of an angle touching the x-axis is directly related to the gradient of the line, simply because tan is opposite divided by adjacent, but then opposite is the change in y and adjacent is the change in x.

So the above is equivalent to change in y divided by change in x, or gradient.

If tan x = k, then the gradient is k or -k depending on whether the line is upsloping or downsloping.
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Eric Nicholas K
Eric Nicholas K's answer
3855 answers (Tutor Details)
Illustration using random numbers