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secondary 3 | E Maths
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need help with qn 5 and 6
Date Posted: 4 years ago
Views: 174
If sin theta = 3/5, then sin ABY = 3/5. This is because sin (180 - x) = sin x by the supplementary angle rule.
This means that
- AY is 3 units
- AB is 5 units
- BY is 4 units by the Pyth. Thm
cos BAY = AY/AB = 3/5
cos XAB
= - cos BAY
= -3/5
(because cos (180 - x) = - cos x by the supplementary angle rule)
I will look at the other question by 4 am if no one else has responded and I can still remember.
This means that
- AY is 3 units
- AB is 5 units
- BY is 4 units by the Pyth. Thm
cos BAY = AY/AB = 3/5
cos XAB
= - cos BAY
= -3/5
(because cos (180 - x) = - cos x by the supplementary angle rule)
I will look at the other question by 4 am if no one else has responded and I can still remember.
See 1 Answer
done
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clear
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Good evening Sally! Here are my workings for this question.
Date Posted:
4 years ago
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