Tim's answer to Koh's Secondary 4 E Maths Singapore question.

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Tim
Tim's answer
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Koh
Koh
1 year ago
Can explain how you get angle pqr as 129? I thought shoule be 50.87. Thks
Tim
Tim
1 year ago
pqr is obtuse angle so must take the angle of sine in the 2nd quadrant. Hope this helps