tahtah99
two birds sit at the top of two different trees 17.8 feet away from one another. The distance between the first bird and a bird watcher on the ground is 37.4 feet.
What is the angle measure, or angle of depression, between this bird and the bird watcher?
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sunsetlove
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i asked this ? befor
sunsetlove
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r u in flvs
tahtah99
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yess i am . do you know it?
sunsetlove
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holed on
tahtah99
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allright :)
sunsetlove
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17.8
sunsetlove
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hold on
sunsetlove
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Height of bird = 17.8
True (slant) distance from watcher to bird = 37.4
Angle theta = asin(17.8/37.4=28.4 degree
sunsetlove
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dose that help
tahtah99
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omg yes ! thank you :) did u pass this test? hah
sunsetlove
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ya i think
sunsetlove
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do u know how to give medles
tahtah99
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i dont understand anything in it.
sunsetlove
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it can help
tahtah99
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i only have like 4 more .
sunsetlove
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if u want just ask and i will
tahtah99
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A lamppost casts a shadow 44 feet long. The angle measure of the shadow is 33°. How tall is the lamppost to the nearest tenth of a foot?
sunsetlove
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hold on
sunsetlove
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h/a
tahtah99
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whats h/a ?
sunsetlove
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52.46
Hero
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|dw:1325123708432:dw|
sunsetlove
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it is COS
tahtah99
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your like saving my life. haha can you answer one more ?
sunsetlove
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h is hypotenuse and a is adjacent
sunsetlove
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yes
tahtah99
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Using ∡C of △CBA shown below, create three different trigonometric ratios using sine, cosine, and tangent. You will need to create your own angle and side measures for this task. For full credit, please provide both the ratio and work used to solve for a missing piece of the triangle. Round all solutions to the nearest hundredth.
Hero
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You can create your own triangle
Hero
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Actually, you should probably draw the triangle first
sunsetlove
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got to my profile and look for the same ? every thing is there
sunsetlove
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did it help
Hero
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I don't know why she didn't just draw the triangle
Hero
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In order to help you, you need to draw it
tahtah99
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hahaha shush. idk how i would word it though. there was so much going on
sunsetlove
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press draw its under ur box to tipe in |dw:1325124389359:dw|
like this
Hero
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|dw:1325124435420:dw|
tahtah99
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|dw:1325124401522:dw|
Hero
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good job
sunsetlove
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|dw:1325124444889:dw|
Hero
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You could have made it look a little prettier than that sunset
tahtah99
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its beautiful .. belongs in a museum
sunsetlove
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yes now 3^2 + 4^2 sholed = the other side
Hero
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Okay sunset :D
tahtah99
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whats the three different trigonometric ratios using sine, cosine, and tangent?
Hero
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Well, if we use sunset's approach:
sunsetlove
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cos is a/h
Hero
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|dw:1325124890880:dw|
sunsetlove
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tan is o/a and sin is o/h
sunsetlove
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dont use the ABC ONES they change if the tryangle is BAC or CAB use what i put
Hero
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She has to use them because they are part of the problem. It has to be in terms of triangle CBA
sunsetlove
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no afince Hero but i tryed doing it that way and it mest me up
Hero
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It doesn't mess everyone up
sunsetlove
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ok but remember it dont always aply just with this problim
tahtah99
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lol im so confused on this part here For full credit, please provide both the ratio and work used to solve for a missing piece of the triangle. what should i put for that ? it has to be in words
Hero
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tahtah, I know you're taking a test
tahtah99
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ik you know im taking a test.
sunsetlove
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ok you have to fined the tangent , cosine, and sine
Hero
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You have to find the angles tahtah
sunsetlove
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sine is opposite/hypotenuse
sunsetlove
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cosine is adjacent/hypotenuse
tahtah99
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how do i find the angles ? i understand the cos and sin thingy now.
Hero
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you have to take the inverse of the ratios
sunsetlove
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tangent is opposite/adjacent
sunsetlove
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u fined the angles using sin cos and tan
Hero
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sunset, she has to take the inverse of those ratios
sunsetlove
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yes my bad but its still using it
Hero
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\[\sin^{-1}(\frac{3}{5})\]
sunsetlove
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yes
Hero
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\[\cos^{-1}(\frac{4}{5})\]
Hero
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\[\tan^{-1}(\frac{3}{4})\]
sunsetlove
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trust hero hes smart
tahtah99
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thank you :) your smart too sunset.
sunsetlove
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thank u good luck
tahtah99
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so i just solve that & it will be the angle?
Hero
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You have to find the other two angles
Hero
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Once you find angle A, you can use the sums of triangles = 180 rule to find the remaining angle.
tahtah99
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mmm would it be .64?
Hero
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make sure you're in DEGREES, not radians
tahtah99
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ahhh . so 64 degrees? haha
Hero
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Just make sure your calculator is in degrees first.
tahtah99
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omg now i got .92 ik thats wrong. i see why my teachers hate me
Hero
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:/
tahtah99
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if you just get me the angle for A i can do the rest.
Hero
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A = 36.87
tahtah99
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saved me. thanks so much man : )
Hero
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You should probably figure out how to use your calc. You're lucky you get to do your test at home. Not every student is so lucky.
tahtah99
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i know :| geo. just isnt my thing
Hero
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It could be if you wanted it to be
felixsalter
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hold on, where's the answer for the original equation?