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who opens .docx anymore?

you can open do docx

you need to use trigonometric functions

i got cos 50=x/90 right

so i got 57.9

The cosine of a 50° angle is 57.9 right

which part the first blank is asking which function to use to find the height

part 1 i think its cosine

if yo are using cos(50)=x/90

yes that's what i did

and i got 57.9

then the next part is asking for the reverse how do you find the cosine function with the two sides

57.8

then input the cosine of 50 in your calculator for the next blank

its asking this this represents the value created when length _____ is divided by ______ feet.

the angle is the value when you divide the sides accordingly

Cos 50 degrees is 0.6428

The cosine of a 50° angle is 57.9 is this right for the second part

so like radar has said the cosine of 50 is .6428
so the sides divided are also .6428

57.8 is the height of the tower because you multiplied the hypotenuse by the cosine to find x

so it will be .6428x.6428

Cos is the adjacent side divided by the hypotenusel.

what happens if you divide the side x by the side of 90

adjacemt side is x right
and hypotenusel is 90

so 57.8 divided by 90

that's what i got

\[\cos 50^{0}=x/90 ft\]

you get .6422

i got 57.9

roughly the same as the cosine for 50 degrees

\[x=.6428 \times90\]

|dw:1349577896978:dw|

that is what we have so far

so it would be 57.9

so x side is 57.9

Yes

when angle was 50 degrees

\[\cos(50^{0})=\frac{ adjacent }{ hypotenuse}\]

The cosine of a 50° angle is .6422 right

the first question only wanted to know that you would use the cosine function to find x

the next blank wants you to input the cosine of 50 which you have .6422

its .6428

yes if you type in cos50 in your calculator that is what you get

this represents the value created when length ____ is divided by ____ feet.

so what about this one

when length is 50 is divided by x feet right

no 50 is the angle you want the height of the tower divided by the lenght of the decline which is 90

when length is 90 divided by x feet

|dw:1349578522617:dw|

right

see how it is lenght x divided by 90 feet

ok i see now
x/90

ok

use the same equation with the cos of 60 instead

so its gonna be cos(60)=x/90

\[\cos(60^{0})=\frac{ x }{ 90ft }\]

so now you need to solve for x

so it would be 45

yes one more blank left

there is two ways to solve for this but you are suppose to use a trig function

there are srry

0.5

If the angle of declination changed to 60°, the angle of inclination would be _____ degrees.

no it wants to know the angle of inclination which is the angle from the bottom

|dw:1349579030126:dw|

|dw:1349579070499:dw|

the angel theta is unknown do you know which trig function to use to solve it

not sure

so theta is 60 degrees right

ok

so you want to use the sine function

|dw:1349579230668:dw|

so apposite side is 45 right

yes

so we trying to find the bottom right

yes the bottom angle

on your calculator you push the 2nd button then 45/90

i got 0.5

you need the inverse sine of .5 which is 2nd sin .5

are you using a ti calculator

no my iphone

you need to look for \[\sin ^{-1}\]

ok

you press sin ^-1

and than 45/90

is that a button

yes
its sin^(-1)

yes what do you get when you put that in

0.5

when you get the true inverse sine you will get 30 degrees

i got 30

http://www.youtube.com/watch?v=T8B8Tcz8kog&feature=related

that is a link to a tutorial that might be able to help