Jermey
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#1
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#1
In the interval 0°< x < 360°,find the values of x for sin x=-0.5243.give your answers to the nearest degree
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CaptainDuckie
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#2
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Ok then, what do you do?

What are your thoughts?
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CaptainDuckie
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What does the sin graph look like? Can you draw it?
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Jermey
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#4
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(Original post by CaptainDuckie)
Ok then, what do you do?

What are your thoughts?
I typed in sin-1(-0,5243)to get 32
Then subtracted it from 360 to get 328 and i dont know how to find the last nu.ber
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CaptainDuckie
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(Original post by Jermey)
I typed in sin-1(-0,5243)to get 32
Then subtracted it from 360 to get 328 and i dont know how to find the last nu.ber
Why subtracting by 360?
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laurawatt
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(Original post by Jermey)
I typed in sin-1(-0,5243)to get 32
I’ve just done the same and got -32 instead
(also note, it’s probably best to keep to as much accuracy as possible as the decimal place may affect which way to rounding goes at the end)
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Muttley79
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(Original post by CaptainDuckie)
Why subtracting by 360?
Answer in 4th quadrant
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Jermey
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#8
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(Original post by CaptainDuckie)
What does the sin graph look like? Can you draw it?
Name:  16101922153648104936939585399520.jpg
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Jermey
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(Original post by laurawatt)
I’ve just done the same and got -32 instead
(also note, it’s probably best to keep to as much accuracy as possible as the decimal place may affect which way to rounding goes at the end)
I got -32
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CaptainDuckie
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(Original post by Jermey)
Name:  16101922153648104936939585399520.jpg
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Ok nice, so what now?
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Jermey
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#11
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(Original post by CaptainDuckie)
Ok nice, so what now?
I need the last number
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CaptainDuckie
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(Original post by Jermey)
I need the last number
What do you think you can do to get it

It’s not -32 as that’s not in the region of 0, 360
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Jermey
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(Original post by CaptainDuckie)
What do you think you can do to get it

It’s not -32 as that’s not in the region of 0, 360
I don't know
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CaptainDuckie
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#14
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#14
(Original post by Jermey)
I don't know
Here you go

https://m.youtube.com/watch?v=fZmT9DiEHKk
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Muttley79
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(Original post by CaptainDuckie)
What do you think you can do to get it

It’s not -32 as that’s not in the region of 0, 360
That is what the calculator gives and your previous answer wasn't helpful ... yes - 32 isn;t right but an answer in the 4th quadrant is.
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CaptainDuckie
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(Original post by Muttley79)
That is what the calculator gives and your previous answer wasn't helpful ... yes - 32 isn;t right but an answer in the 4th quadrant is.
lol how wasn’t my answer helpful?

I’m just trying to help, don’t judge me.
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Muttley79
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#17
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(Original post by Jermey)
I don't know
Your answer 328 was nearly correct [you just rounded 32 too much]- please don't be put off.

Your graph is also correct so you are looking for an angle in the third quadrant - now - what might that be? I also agree that you need to keep at least 1 dp accuracy.
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Jermey
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#18
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(Original post by Muttley79)
Your answer 328 was nearly correct [you just rounded 32 too much]- please don't be put off.

Your graph is also correct so you are looking for an angle in the third quadrant - now - what might that be? I also agree that you need to keep at least 1 dp accuracy.
I am confused
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Muttley79
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#19
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(Original post by CaptainDuckie)
lol how wasn’t my answer helpful?

I’m just trying to help, don’t judge me.
Read your first post when you queried a correct answer - please if you aren't sure don't post.
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Jermey
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#20
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Could you pls use an example
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