Solve for x. Round your answer to 2 decimal places.

- anonymous

Solve for x. Round your answer to 2 decimal places.

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- anonymous

##### 1 Attachment

- anonymous

21.71 correct?

- phi

how?

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## More answers

- ganeshie8

looks u have used cos, u must use sin soh-cah

- anonymous

so, i tried again and got 14.90

- phi

how? what steps are you taking?

- anonymous

sin opp/hyp

- phi

that is a good start |dw:1350512679019:dw|

- phi

can you fill in the numbers in sin( angle) = opp/hyp

- anonymous

the angles yess

- anonymous

then do that weird formula with A=(c+b)...

- anonymous

which now gave me 32.19

- phi

what did you do?

- anonymous

sin(θ) = Opposite / Hypotenuse

- phi

yes, but what numbers?

- anonymous

idk im lost idk my steps im getting it wrong its confusing me now

- phi

Look at the picture. The angle is 34 degrees, right? I would replace θ with 34 in your equation sin(θ) = Opposite / Hypotenuse which side is opposite (look at my picture) how long is it?

- anonymous

90?

- phi

90 is an angle (the right angle) the sides are the lines. I drew an arrow pointing at the line opposite the 34 degree angle

- anonymous

oh ok so 34/ hyp

- anonymous

couldnt i do pythergerium therom?

- phi

34 is an angle. remember that you want the legs (the sides of the triangle)

- phi

and we need to use trig here. pythagoras needs 2 sides (and no angles). But here we know 1 side and 1 angle. so we use trig. what is the length of the side opposite the 34 deg angle. look at the picture.

- anonymous

18

- phi

yes. you replace opposite in sin(θ) = Opposite / Hypotenuse with 18. you replace θ with the angle 34 can you do that?

- anonymous

18/34

- phi

pay attention: 34 is an angle. sin(θ) = Opposite / Hypotenuse means that the sin of an angle is opposite leg/ hypotenuse sin(34)= 18/x x because the picture calls the hypotenuse x now you need to solve for x can you do that ?

- anonymous

its 32.1 ! :DDDD

- phi

just for info: If you are given 1+a and are told: replace a with 2, you would write 1+2 if your are given a/b and are told replace b with 3, you would write a/3 you need to do this "replace" to use these equations.

- anonymous

i got it its 32.1 !! :)

- anonymous

thank you so much for spending sooo much time on this with me !!!!

- phi

how did you do it (it's right, BUT Round your answer to 2 decimal places.) but how did you do it?

- anonymous

32.19 i just re possisioned the sin(34)= 18/x

- anonymous

pluged it into the cal

- anonymous

to find x

- phi

yes. You got it.

- phi

if you have time, this video http://www.khanacademy.org/math/trigonometry/v/basic-trigonometry might be helpful. It helps me to see someone do the steps.

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