Question

What is the equation of the following graph?
http://i729.photobucket.com/albums/ww292/akatushi101/A2_55_Quiz_13.jpg

Answer 1

Do you have the choices?
There can be many correct answers, but all correct, such as:
tan(x+pi/2), tan(x-pi/2), cot(-x), -cot(x), etc.

See also sample curves:
http://www.google.ca/search?q=graph+of+cotangent&hl=en&client=firefox-a&hs=Tmt&rls=org.mozilla:en-US:official&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=qPUFT-_pA6Te0QG2xIjDAg&ved=0CCEQsAQ&biw=1254&bih=644

Answer 2

What is the equation of the following graph?
http://i729.photobucket.com/albums/ww292/akatushi101/mathyyyyy.gif

Answer 3

That looks like a sine curve to me, or
y=sin(x)

Answer 4

What is the equation of the following graph?

http://i729.photobucket.com/albums/ww292/akatushi101/wathhhhhhhh.gif

Answer 5

Sorry, I have a correction to make for the previous one.
The sine curve had their extremes at +/- 2, so the equation should be
y=2sin(x)

Here for this one, it is still a sine curve, and the extremes go from -1 to 5, so it would be y=3sin(x). However, you notice that it is not balanced about the x-axis, but shifted up by 2 units, so the equation is
y=3sin(x)+2

Answer 6

I have two more qeustions:
Find side BC. Round your answer to the nearest hundredth.
http://i729.photobucket.com/albums/ww292/akatushi101/youuuu-1.jpg

Answer 7

tan(28)=BC/29.3
Solve for BC

Answer 8

Next?

Answer 9

Find side AB. Round your answer to the nearest hundredth.
http://i729.photobucket.com/albums/ww292/akatushi101/youuuu-1.jpg

Answer 10

im confused for solving BC :/

Answer 11

cos(28)=29.3/AB
Solve for AB.

Answer 12

so AB = 29.3/28?

Answer 13

Not exactly.
AB=29.3/cos(28)

Cos(28) is a function that you have on your (scientific) calculator or from a table. It should be a number always less than 1 and depends on the angle, 28 degrees in this case.

Answer 14

i dont have a scientific calculator..so what will AB equal too?

Answer 15

Then you can type into google
29.3 / cos(28 degrees)
It will return the correct value.
You need to specify degrees, otherwise it defaults to radians.

Answer 16

okay last one...thank you so much for all the help :)
http://i729.photobucket.com/albums/ww292/akatushi101/A2_5_Exam_56.jpg

Answer 17

Find side BC. Round your answer to the nearest hundredth.

Answer 18

\[\text{BC} = 3 \text{ Sin}[ 40{}^{\circ}]= 1.93 \text{ cm} \]

Answer 19

A plane is descending towards a runway in New York. The plane is flying at an altitude of 8 miles and is 175 miles from the runway, as measured from the ground. What angle will the plane's path make with the runway? Round your answer to the nearest hundredth.

Answer 20

Thank you for the medal. The OpenStudy equation editor is not working properly. The degree symbol was placed somewhere South West of the closing bracket.

Answer 21

ArcTan[8/175]=2.62 degrees as viewed from the runway touchdown point or the angle of depression as viewed airplane pilot.

Answer 22

as viewed by the airplane pilot.

Answer 23

http://i729.photobucket.com/albums/ww292/akatushi101/A2_5_Exam_69.gif
What is the equation of the following graph?

this is the last question.

Answer 24

For robtobey:
\[28.3\,^{\circ}\]
can be written in equation editor with
28.3\,^{\circ}

Answer 25

A plot of 2*Sin(x) from x = 0, through x = 2 Pi is attached.

Answer 26

@mathmate

The LaTex text formulated by Mathematica for 28.3 degrees is the following:
28.3 {}^{\circ}

Refer to the two screen capture attachments.
My conclusion is that it's a browser problem.

Answer 27

@robtobey
It could very well be a browser problem, because I use firefox, and it shows up well.
Does my previous post show properly on your browser?