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secondary 3 | E Maths
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To discuss Part (C)!
In this case, both Sine rule and Cosine rule should be able to use to find angle ADC but somehow both techniques return a completely different answer. Am I missing out a constraint here?
Date Posted: 3 years ago
Views: 306
The triangle on the right side is not scaled correctly.
With sides of 9.5cm, 6.5cm and 3.80399cm, angle ACD should be 132.69° instead.
With sides of 9.5cm, 6.5cm and 3.80399cm, angle ACD should be 132.69° instead.
However, if AD = 9.5cm and ∠ACD = 115.855° are taken to be correct, then CD cannot be 6.5cm. It has to be ≈ 7.20 cm
In view of the incorrectly scaled triangle ACD, both approaches should be given full credit even though the answers are different, since both approaches are correct.
In view of the incorrectly scaled triangle ACD, both approaches should be given full credit even though the answers are different, since both approaches are correct.
You can try this tool :
https://www.calculator.net/triangle-calculator.html
https://www.calculator.net/triangle-calculator.html
Thanks for the comments J!! They've been very helpful
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This should be correct dimension.
Date Posted:
3 years ago
Thank you for working on the correction!
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