Question

CAN SOMEONE PLEASEE HELPPP??
Find x in this 45°-45°-90° triangle
https://media.glynlyon.com/g_geo_2012/11/groupi52.gif
the link of the pic^

Answer 1

Try the law of sines, Sin[90] / 12 = Sin[45] / x ; after solving: 12/Sqrt[2]

Answer 2

is this the simplified way?

Answer 3

6*sqrt[2] is it :D lol I typed in the wrong answer in my above post, you can solve em better than I :)

Answer 4

okay thank you soo much! what about this?
https://media.glynlyon.com/g_geo_2012/11/groupi50.gif
i still dont understand how you plug in the sine on the calculator cause it comes out as a fraction

Answer 5

decimal* not fraction

Answer 6

The answer is 22*Sin[45] = 22/Sqrt[2] and this is an irrational number so it makes sense that it spits out a decimal automatically, I'm sure there's a way to convert it to a fraction, what calculator are you using?

Answer 7

a scientific calculator.. it has the sin cos tan buttons but idk how to use them

Answer 8

You can try http://www.wolframalpha.com/input/?i=Solve%5BSin%5BPi%2F2%5D%2F22%3DSin%5BPi%2F4%5D%2Fx%2Cx%5D

wolframalpha is a great online calculator
which will show various answer forms like fraction or decimal

Answer 9

okay.. but when it comes to this what do you do?
https://media.glynlyon.com/g_geo_2012/11/groupi55.gif

Answer 10

Use the law of sines as always, don't let a square root for a side make you think anything is different.

Answer 11

can you explain step by step on what you would plug in to the calculator

Answer 12

First I would symbolically solve the problem, Sqrt[24]/Sin[90] = x/Sin[45] ;
x = Sqrt[24]*Sin[45]/Sin[90]

So now we need to translate the above into your calculator.

if you're calculator uses degrees
sqrt(24)*sin(45)/sin(90)
and if youre calculator is set to radians
sqrt(24)*sin(Pi/4)/Sin(Pi/2)

Answer 13

okay thanks so much