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secondary 3 | A Maths
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Jason Lim
Jason Lim

secondary 3 chevron_right A Maths chevron_right Singapore

Pls help with iv) ONLY thanks in advance

Date Posted: 3 years ago
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Ting Xuan
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Eric Nicholas K
Eric Nicholas K
3 years ago
No; you missed out the rejection of the negative solution, since angle A being obtuse implies angle A/2 being acute, meaning to say that sin (A/2) must have a positive value.