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cagliero423
 one year ago
Law of Sines help???
So I have a project and I have to find the measures of angles B and C on all these triangles. They give me measure A and what a and b equal and I know that sinA/a= SinB/b = SinC/c but every time I try and use this it doesn't work out, even when I have an example in my book and I type it into my calculator I get a different answer than the book and I'm just trying to understand what I'm doing wrong. Help would be appreciated!
cagliero423
 one year ago
Law of Sines help??? So I have a project and I have to find the measures of angles B and C on all these triangles. They give me measure A and what a and b equal and I know that sinA/a= SinB/b = SinC/c but every time I try and use this it doesn't work out, even when I have an example in my book and I type it into my calculator I get a different answer than the book and I'm just trying to understand what I'm doing wrong. Help would be appreciated!

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.1have you got an example?

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Like in the book there is an equation and it says sin 109/RQ=sin39/40 RQ= 40 sin109/sin39 which is about 60.1 cm but when I type it into my calculator I get 33.9

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1thats equation RQ = is correct

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Yeah I know because it's in my book but I keep getting 33.9 and the answer is 60.1???

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0I type it in just as the equation says.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1ok calculators vary in the way you enter data with mine if in enter 40 * sin109 / sin 39 it gives me 60.09

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0that is seriously exactly what i type into mine? I don't understand hahah

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1with some calculators you need to add angle first then sin

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1ok the sin 109 is the way to go try sin 109 then hit exe

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0I don't see a button that says exe

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1well whatever button you use to get a result

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1or does it give you the answer automatically

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1well it should be 0.9455

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1is your calculator set to degrees or radians?

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0I have no clue how do I find out???

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1thats the problem!!!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1i just set mine to radians and got 0.816

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0omg, how do I change it to degrees?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1what make is ur calculator?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1oh i don't know about those . Mines a Casio  maybe you can find a manual online.

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Okay, I will do that, you're a life saver I would have never figured that out! haha thank you(:

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Okay could you help me with something really quick actually? I just want to make sure I'm doing this right. my first equation I have angle A= 62 degrees a= 30 and b=32. So if I'm trying to find angle B I set it up like Sin62/30=SinB/32 right??

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0and then it's 32*Sin62/30 ?

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Okay but then I get .9418 as my answer?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1By the way  i used to have a TI a long way back  i remember you changed degrees to radians and vise versa using the MODE key

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Yeah I found a video on how to do it so i fixed that(:

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Okay so then is angle B .9418 degrees? I don't get what to do next

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1no thats the sine of the angle you need the inverse sine on ur calc  its either marked sin1 or arcsin

Cagliero423
 one year ago
Best ResponseYou've already chosen the best response.0Ohh okay, thank you again, I think that's all I needed to know(:
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