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# Stuck on c2 questions can anyone explain? watch

1. could anyone explain what part b is asking? I am really confused as to what it means by deduce the area and I don't get how u would do c and d either thanks so much
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2. (Original post by coconut64)
could anyone explain what part b is asking? I am really confused as to what it means by deduce the area and I don't get how u would do c and d either thanks so much
You know that the area of a sector with radius r and angle theta is ....

and the previous question made you find theta in terms of p and r so...
3. (Original post by SeanFM)
You know that the area of a sector with radius r and angle theta is ....

and the previous question made you find theta in terms of p and r so...
4. (Original post by coconut64)
I think you mean that theta = p/r.

The area of the sector is 1/2 * r^2 * theta, but you don't know what theta is, only how to work it out, which you got in part a).

Think of it like simultaneous equations - you've found an equation for theta and put it into the equation you're concerned about - which is the area of the sector.
5. (Original post by SeanFM)
I think you mean that theta = p/r.

The area of the sector is 1/2 * r^2 * theta, but you don't know what theta is, only how to work it out, which you got in part a).

Think of it like simultaneous equations - you've found an equation for theta and put it into the equation you're concerned about - which is the area of the sector.
I get it now thanks but I don't know how you would do part d.
6. (Original post by coconut64)
I get it now thanks but I don't know how you would do part d.
Think about how you would find the minimum value theta can be and the maximum, and then you've pretty much got the range.
7. (Original post by SeanFM)
Think about how you would find the minimum value theta can be and the maximum, and then you've pretty much got the range.
Thank you, finally got it at the end; )

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