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Mathematics 18 Online
OpenStudy (anonymous):

Find x. Round to the nearest tenth. Picture attached!!

OpenStudy (anonymous):

OpenStudy (tkhunny):

Have you considered the Law of Sines?

OpenStudy (anonymous):

no i havent but isnt that opposite hypotenuse?

OpenStudy (anonymous):

@tkhunny

OpenStudy (anonymous):

\[\frac{ a }{ \sin A }=\frac{ b }{ \sin B }=\frac{ c }{ \sin C }\]where a,b,c are sides and A,B,C are the angles opposite the corresponding sides

OpenStudy (anonymous):

\[\frac{ x }{ \sin 87 }=\frac{ 21 }{ \sin 37 }\]

OpenStudy (tkhunny):

You don't have any right angles. "hypotenuse" doesn't mean anything for this triangle.

OpenStudy (anonymous):

cross multiply and solve for x using algebra

OpenStudy (anonymous):

ohk

OpenStudy (anonymous):

when you don't have a right triangle think law of sines or law of cosines

OpenStudy (anonymous):

ohk so i get rid of the 37 first right?.... by multiplying?

OpenStudy (tkhunny):

You calculate the values for sine and then you solve for the missing item. In this case, it is only a simple multiplication.

OpenStudy (anonymous):

i multiply 21 and 87?

OpenStudy (anonymous):

which is 1827

OpenStudy (tkhunny):

No, there is not 87 or 37. You must first calculate the sine of those angle measures.

OpenStudy (anonymous):

uggh this is too much and its late thanks for all you help but i cnt concentrate when im sleepy... so i will be asking this question again tomorrow.

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