need help asap, confused on how to even find the first angle

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secondary 4 | E Maths
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secondary 4 E Maths Singapore

need help asap, confused on how to even find the first angle

Date Posted: 9 months ago

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Date Posted: 9 months ago

Hanji’s

9 months ago

thank you so much !!

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Date Posted: 9 months ago

How Wei Qi

9 months ago

pink part is explanation. hope it makes sense!

Hanji’s

9 months ago

thank you thank you !!