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secondary 3 | E Maths
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Nicole She
Nicole She

secondary 3 chevron_right E Maths chevron_right Singapore

Pls help with part b(ii). Thank you

Date Posted: 10 months ago
Views: 36
Eric Nicholas K
Eric Nicholas K
10 months ago
cos x = - cos PQS = -12/13

(since x and PQS are supplementary)

The treatment of this is in the ASTC quadrants in A Maths.

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Anas Bin Rahamat
Anas Bin Rahamat's answer
4 answers (Tutor Details)
Hi, hope this helps
Eric Nicholas K
Eric Nicholas K
10 months ago
Not a good approach for E Maths since this formula is not listed in E Maths and I am not sure if the student has even learnt the addition angle formula in A Maths at this point of time (some schools have taught this already while others have not).