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secondary 3 | E Maths
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How to do part 12(b)
Date Posted: 5 years ago
Views: 394
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May I know what's the method use below to find the area. I don't think I was taught by my teacher.
That's a method taught in A.Maths.Alternatively,you can find the lengths of AB and AC using the length formula.Then,find angle BAC using Cosine Rule.Then, area of triangle ABC = 1/2 × AB × AC× sin angle BAC.If you need the solution using this method,do let me know.Thks.
done
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Alternative Method to solve 12b).My previous method uses a method taught in A.Maths.This method uses formulas and methods taught in E.Maths.Hope it helps you.
Date Posted:
5 years ago
Thanks a lot. I have not learnt this cos formula thingy. I will ask my teacher about it. Thanks a lot for yr help.
You are welcome.
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