trigonometry
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#2
(Original post by louise18152)
can someone help me with a trigonometry question
can someone help me with a trigonometry question
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(Original post by mqb2766)
Can you upload the question if you want some advice.
Can you upload the question if you want some advice.
and I have to find what the values for bAc and aBc are
then find the area
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#4
(Original post by louise18152)
hi the question was the triangle ABC is ab-12cm,bc=10cmand cAb=45 degrees
and I have to find what the values for bAc and aBc are
then find the area
hi the question was the triangle ABC is ab-12cm,bc=10cmand cAb=45 degrees
and I have to find what the values for bAc and aBc are
then find the area
What rules do you know that might be useful to find the angles?
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i
I've drawn it but I don't know how to upload it
I still don't know
(Original post by mqb2766)
Can you sketch it (and upload)?
What rules do you know that might be useful to find the angles?
Can you sketch it (and upload)?
What rules do you know that might be useful to find the angles?
I still don't know
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#6
For the angles - sides you're given, how are they related?
Is it a right angled triangle?
If not, which (two) rules do you know?
Which one matches the information you're given & want to find.
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(Original post by mqb2766)
If you press the camera icon at the top of the Reply, you can upload an image.
For the angles - sides you're given, how are they related?
Is it a right angled triangle?
If not, which (two) rules do you know?
Which one matches the information you're given & want to find.
If you press the camera icon at the top of the Reply, you can upload an image.
For the angles - sides you're given, how are they related?
Is it a right angled triangle?
If not, which (two) rules do you know?
Which one matches the information you're given & want to find.
the sine and cosine rules
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(Original post by mqb2766)
Yes, so which one is appropriate here to find the first angle?
Yes, so which one is appropriate here to find the first angle?
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#11
(Original post by louise18152)
sine 45/10=sinec/12
sine 45/10=sinec/12
Then how do you simply get the third angle?
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#13
(Original post by louise18152)
could you do 180 -45 - 58.05
could you do 180 -45 - 58.05
Then you know two sides and the angle between them, so the area is given by ...
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#14
I’m pretty sure you use the sine rule (don’t forget to label the sides as either a, b and c)
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(Original post by TurtlePowerXII)
I’m pretty sure you use the sine rule (don’t forget to label the sides as either a, b and c)
I’m pretty sure you use the sine rule (don’t forget to label the sides as either a, b and c)
(Original post by mqb2766)
If course.
Then you know two sides and the angle between them, so the area is given by ...
If course.
Then you know two sides and the angle between them, so the area is given by ...
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#16
(Original post by louise18152)
1/2ab sinc
1/2ab sinc
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(Original post by mqb2766)
Yes. I've told you nothing here, you know how to do it.
Yes. I've told you nothing here, you know how to do it.
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#18
(Original post by louise18152)
would you be able to help with other
would you be able to help with other
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#20
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