zhane2015
Heyy PARTY PEOPLE!! Help me, and u can get a fan or a medal!!
9.
Find the value of x. Round to the nearest tenth. The diagram is not drawn to scale.
triangle with sides X, 11 and a 24 degree angle (2 points)
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zhane2015
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|dw:1361201598838:dw|
amistre64
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what do you know about trig functions?
zhane2015
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I need a walkthough
zhane2015
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sine cosine and tangent
amistre64
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|dw:1361201660763:dw|
amistre64
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which trig function uses the next.to (adjacent) and hypotenuse
amistre64
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tangent never looks at the hypotenuse; tan = over/nextto
whats you next best one?
amistre64
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might help to write out the functions :) just as a review
zhane2015
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Cosine
amistre64
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cosine is the winner !!
now, cosine = next.to/ hypotenuse
amistre64
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with what is given that leaves us:
cos(24) = 11/x
can you solve for x?
zhane2015
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manually?? or can i use a calculator?
amistre64
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youll need a calculator or table to determine cos(24)
but just the setup would be useful. How would we move this equation around to solve for x?
zhane2015
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I have NO CLUE, but the calculator is telling me 12.04
zhane2015
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Oh ok thanks I understand now, and I have another question if you don't mind
amistre64
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if its a quick one, I have real job stuff that i have to attend to :)
zhane2015
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kk hold on
zhane2015
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What is the value of w to the nearest degree?
Diagram (1 point)
25°
35°
40°
45°
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amistre64
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the idea is to find v in order to find w, right?
zhane2015
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If this isn't quick you don't have to help, I don't want to waste your time
zhane2015
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but yes
amistre64
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itll be quick enough, go ahead and write out the sin cos tan function for me so we can reference them
zhane2015
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sin = Opposite/Hyp.
cos = adjacent/ Hyp.
tan= opposite/adjacent
amistre64
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lets name the parts to compare as well
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amistre64
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in my mind, over is the same as opposite :)
zhane2015
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oh ok,
amistre64
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so, would you agree that the sine function works best for us on this one?
zhane2015
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Yes
amistre64
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sin(65) = v/15 ; v = 15 sin(65)
sin(w) = v/21, replacing the value of v we get
sin(w) = 15 sin(65)/21
this make sense so far?
zhane2015
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yes, I think i got it from here, Thanks
amistre64
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good :) keep in mind that to find w we need to do an inverse sin operation
zhane2015
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I gotcha ;)