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Mathematics 20 Online
OpenStudy (armyrangers):

Use the image below to answer the following question. Find the value of sin x° and cos y°. What relationship do the ratios of sin x° and cos y° share?

OpenStudy (armyrangers):

OpenStudy (anonymous):

okay sin=opposite/hypotenuse and cos=adjacent/hypotenuse

OpenStudy (anonymous):

since we don't have the hypotenuse.we need to use pythagorean theorem

OpenStudy (anonymous):

you know how to use Pythagorean theorem? a^2+b^2=c^2

OpenStudy (armyrangers):

Yes I do sorry I was talking to my mom

OpenStudy (anonymous):

it's okay.This lag is killing me!.

OpenStudy (armyrangers):

Lol so what do I do

OpenStudy (armyrangers):

239^2 right

OpenStudy (anonymous):

my bad it is 8^2+15^2=c^2 I put 15^5 and it was not like that. 8*8+15*15=c^2

OpenStudy (armyrangers):

289

OpenStudy (anonymous):

correct :).But remember 289^2.So with that square you're gonna find the square root of 289

OpenStudy (armyrangers):

17

OpenStudy (anonymous):

right. so you got all the sides. |dw:1403893620061:dw|

OpenStudy (anonymous):

now lets go find sinx first

OpenStudy (anonymous):

remember the formula I gave you before for sin?

OpenStudy (armyrangers):

So is It 8/17

OpenStudy (anonymous):

right :).so sinx=8/17 so now solve it. 8/17=?

OpenStudy (armyrangers):

.47

OpenStudy (anonymous):

right always in thing cases always try to use 4 numbers after the decimal point. so like this 0.4705

OpenStudy (armyrangers):

Ok so whats next

OpenStudy (anonymous):

so now on your calculator make sure it's on grad.press a buttom that says 2nd and then sin and plug in that number

OpenStudy (anonymous):

I mean not on grad.I mean degree

OpenStudy (armyrangers):

Wait what put what In

OpenStudy (anonymous):

your calculator have to be in degree.and in there there's a buttom that says 2nd.After pressing 2nd press sin.And then will appear something like parenthesis and then plug in your answer that is 0.4705

OpenStudy (armyrangers):

I got 0.4533 is that right

OpenStudy (anonymous):

noo.well I can't explain you how to use the calculator I'm not a good teach I barely know how to explain lol but. the answer is 28.06

OpenStudy (armyrangers):

CAn you just tell me what I need to type so I can be done with this test

OpenStudy (anonymous):

in the calculator press a buttom that says 2nd.After pressing 2nd press sin and then in the calculator it will appear somethin that looks like this sin-1( and then plug in the number 0.4705

OpenStudy (anonymous):

and thats your answer for x

OpenStudy (anonymous):

it has to give you 28.06

OpenStudy (anonymous):

is that one of your answer choices?

OpenStudy (anonymous):

now for lets go for cos y.You remember the formula? I know you can do it by yourself

OpenStudy (anonymous):

and as you will see that thing that they share is that they have same answer.Or equal angles.

OpenStudy (anonymous):

it will give you the same answer if you go for cos y. :).It was nice to talk to you sir.Soldier I'm out! ughh :D

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