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Mathematics 8 Online
OpenStudy (anonymous):

can someone help me with this problem?

OpenStudy (anonymous):

whats the problem?

OpenStudy (anonymous):

I'll draw it up

OpenStudy (anonymous):

|dw:1421799055874:dw|

OpenStudy (anonymous):

question says label triangle write ratio

Directrix (directrix):

Which right triangle trig ratio relates the adjacent leg to the hypotenuse?

OpenStudy (anonymous):

the x is the opposite because its the opposite from the angle. the hypotenuse is the blank side and the adj is the 23?

Directrix (directrix):

The hypotenuse is the side opposite the right angle. It is the side you have marked to be x. The adjacent side is 23. The angle is 63. So, which trig function?

OpenStudy (anonymous):

Add 63 + 23 and put 86 over X and simplify i think

OpenStudy (anonymous):

i hope this helped

OpenStudy (anonymous):

ok so i understand it alittle then I dont :/

OpenStudy (jdoe0001):

recall you SOH CAH TOA again |dw:1421800270160:dw| \(\bf {\color{brown}{ sin}}(\theta)=\cfrac{opposite}{hypotenuse}= \cfrac{opposite}{x}\implies x=\cfrac{opposite}{sin(\theta)} \\ \quad \\ % cosine {\color{blue}{ cos}}(\theta)=\cfrac{adjacent}{hypotenuse}= \cfrac{adjacent}{x}\implies x=\cfrac{adjacent}{cos(\theta)} \\ \quad \\ % tangent tan(\theta)=\cfrac{opposite}{adjacent}\implies tan(\theta)\cdot adjacent=opposite\)

OpenStudy (jdoe0001):

also keep in mind that the opposite side is always the one "facing off" the angle and the other leg/side is the adjacent one

OpenStudy (anonymous):

but how can I find X?

OpenStudy (anonymous):

@jdoe0001

OpenStudy (jdoe0001):

well. notice above, use either the sine or cosine functions what's the opposite side? well, notice the tangentt function above recall that you are given the angle, and the adjacent side

OpenStudy (anonymous):

Simplify 86 over X and X='s whatever you divided by to get that answer i don't know if i'm correct

OpenStudy (anonymous):

ohhhh ok ty

OpenStudy (anonymous):

sorry about that

OpenStudy (anonymous):

ok so like you see how like you did 23+63=86 I put 86/x but what can I divide? im kind of stuck?

OpenStudy (anonymous):

@nalias

OpenStudy (jdoe0001):

hmmm recall that adjacent side = 23 and the angle = 63 degrees thus \(\bf {\color{brown}{ sin}}(\theta)=\cfrac{opposite}{hypotenuse}= \cfrac{opposite}{x}\implies x=\cfrac{opposite}{sin(63^o)} \\ \quad \\ % cosine {\color{blue}{ cos}}(\theta)=\cfrac{adjacent}{hypotenuse}= \cfrac{adjacent}{x}\implies x={\color{purple}{\cfrac{23}{cos(63^o)}}} \\ \quad \\ % tangent tan(\theta)=\cfrac{opposite}{adjacent}\implies {\color{brown}{ tan(63^o)\cdot 23}}=opposite\)

OpenStudy (anonymous):

Thank you !

OpenStudy (jdoe0001):

yw

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