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SmoothMath
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What have you tried so far?
mathslover
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|dw:1341504473383:dw|
SmoothMath
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This is very similar to the kind of problem I taught you before.
rebeccaskell94
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Well I looked at the triangle and saw that like EF is opposite and DE is adjacent sooo I use tan?
SmoothMath
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Very good. Keep going. Use tangent to set up the equation.
mathslover
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soa cah toa .. tan (theta)= opposite / adjacent .. good u r going right best of luck
SmoothMath
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soh cah toa*
ivandelgado6
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SmoothMath help me
SmoothMath
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Sorry, Becca is cuter.
rebeccaskell94
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:3> xD thanks
Okay, um Tan(45) = x/55 ?
rebeccaskell94
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x= 2,475
SmoothMath
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Looks good. Solve for x and then round to the nearest hundredth like they ask.
SmoothMath
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Oh wait. One problem with your equation. The angle isn't 45.
rebeccaskell94
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lol derp. 49
Tan(49) = x/55
x= 2,695
rebeccaskell94
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or just 2700
SmoothMath
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I don't know what you did, but 2,695 is super super off.
rebeccaskell94
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D: I thought it was 49 x 55 to find out x to then divide it and then make it like...right
=2695/55 = 49
SmoothMath
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TANGENT of 49... super different from 49.
Use your calculator to find out what tan(49) is. Make sure you're in degrees and not radians.
SmoothMath
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tan(49) = x/55
Just solve for x, then let your calculator do the trig function for you.
rebeccaskell94
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my calculator doesn't do anything but x/55
SmoothMath
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It really doesn't have sin cos tan buttons on it? You'll need to use a different calculator then, or else use google or alpha.
rebeccaskell94
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Or is it just the 1.15 thing
rebeccaskell94
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ohhh like tan(49) = 1.15/55 ?
SmoothMath
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Far left, below pi, you'll see the buttons sin, cos, and tan. Those are your trig functions. To do this one, click tan, then 49, then ). Should look like this:
I've boxed the trig function buttons in blue and the way to switch between degrees and radian modes in green.
SmoothMath
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Becca, please don't forget how to do simple algebra.
tan(49) = x/55
How do you solve for x?
rebeccaskell94
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49/1 • x/55? ... My brain...it's dying. :(
SmoothMath
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multiply both sides by 55. -_-
rebeccaskell94
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-__- dollface
49 • 55 and x/55 • 55?
SmoothMath
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not 49*55.
tan(49)*55
SmoothMath
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and what is x/55 * 55?
rebeccaskell94
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1?
SmoothMath
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oh my goodness.
Becca, can you solve this equation for me?
4 = x/2
rebeccaskell94
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8
SmoothMath
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Same dang thing here.
tan(49) = x/55
Wolfboy
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55*49.........
SmoothMath
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Wrong, wolfboy.
rebeccaskell94
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Its not just 55*49 D: he said it's tan(49) :(
SmoothMath
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55* tan(49)
Wolfboy
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I. Thought sooo......hmmmmmm
Wolfboy
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Sooo we need the formula for tan or a couculater
rebeccaskell94
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63.27?
SmoothMath
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Yes. Let me just show you the last 2 steps.
You got as far as
tan(49) = x/55
multiply both sides by 55. That's basic algebra, solving for x.
55*tan(49) = x
tan of 49, when you put in your calculator is 1.15036841
and
55*(1.15036841) = 63.2702625
then, of course you round to the nearest hundredth.
rebeccaskell94
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Thank you dollface :D Sorry if I frustrated you :c
SmoothMath
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You didn't, cutesie buttons. I'm happy to help. =)
rebeccaskell94
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Yay :D