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secondary 4 | A Maths
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##### Alice

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pls help me out ://

Date Posted: 8 months ago
Views: 182
Sstrike
8 months ago
θ₁ = 135°
θ₂ = 315°

https://www.mathcelebrity.com/anglebasic.php?entry=145&coff=&pl=cot

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##### Johnson's answer
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Hope it helps
Date Posted: 8 months ago
Eric Nicholas K
8 months ago
How about cot theta = 0? There are solutions to it.

Of course, not if you view it as cot theta = 1 / tan theta (at least for O Levels where they count tan pi/2 as “undefined”).

If you view it as cot theta = cos theta / sin theta and we realise that cos and sin of the angle cannot be zero at the same time (ie 0/0 is not possible) then cot theta = 0 leads to cos theta = 0.

With angles pi/2 and 3pi/2.