babydoll332
Solve for x. Round your answer to 2 decimal places.
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babydoll332
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babydoll332
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21.71 correct?
phi
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how?
ganeshie8
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looks u have used cos, u must use sin
soh-cah
babydoll332
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so, i tried again and got 14.90
phi
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how?
what steps are you taking?
babydoll332
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sin opp/hyp
phi
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that is a good start
|dw:1350512679019:dw|
phi
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can you fill in the numbers in
sin( angle) = opp/hyp
babydoll332
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the angles yess
babydoll332
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then do that weird formula with A=(c+b)...
babydoll332
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which now gave me 32.19
phi
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what did you do?
babydoll332
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sin(θ) = Opposite / Hypotenuse
phi
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yes, but what numbers?
babydoll332
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idk im lost idk my steps im getting it wrong its confusing me now
phi
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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?
babydoll332
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90?
phi
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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
babydoll332
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oh ok so 34/ hyp
babydoll332
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couldnt i do pythergerium therom?
phi
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34 is an angle. remember that you want the legs (the sides of the triangle)
phi
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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.
babydoll332
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18
phi
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yes. you replace opposite in
sin(θ) = Opposite / Hypotenuse
with 18. you replace θ with the angle 34
can you do that?
babydoll332
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18/34
phi
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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 ?
babydoll332
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its 32.1 ! :DDDD
phi
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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.
babydoll332
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i got it its 32.1 !! :)
babydoll332
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thank you so much for spending sooo much time on this with me !!!!
phi
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how did you do it (it's right, BUT Round your answer to 2 decimal places.)
but how did you do it?
babydoll332
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32.19 i just re possisioned the sin(34)= 18/x
babydoll332
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pluged it into the cal
babydoll332
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to find x
phi
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yes. You got it.