Jk's answer to heyhiyo's Secondary 4 A Maths Singapore question.

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Jk
Jk's answer
18 answers (Tutor Details)
1st
:)
Eric Nicholas K
Eric Nicholas K
2 years ago
cos x = plus minus (sqrt 3)/2

Allowing x = 5pi/6 as another valid solution, which will be a minimum point on the graph.
Jk
Jk
2 years ago
Thank you!sharp eyes there :)