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secondary 3 E Maths Singapore

I need help with this qns

Date Posted: 5 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Hope my explanation is clear..

Date Posted: 5 years ago

Mathaddict100

5 years ago

What I meant to say for the covered part is
*so this is referring to the value of it's angle*..

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Here's a explanation on the negative sign..

Date Posted: 5 years ago

Mathaddict100

5 years ago

Oops..it's 180+x for the 3rd quadrant in the diagram..