- anonymous

which is the standard form of the equation with p=18, phi =5pi/4?

- chestercat

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- skullpatrol

check the question please

- Haseeb96

Is this question complete ?

- anonymous

this question is complete.. its trig identities.. so we're going off of the equation x cos phi + y sin phi - p=0

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## More answers

- Ali0094

what does PHI mean?!!

- skullpatrol

how was the question complete when you did not give the equation?

- anonymous

phi looks like this... \[\phi \]

- anonymous

because you are just suppose to know it... this was the question lol

##### 1 Attachment

- skullpatrol

|dw:1433104243974:dw|

- Ali0094

what a hard question...lol

- anonymous

thats correct @skullpatrol .. and then what i did next was convert the radian 5pi/4 into degrees to make it easier to simplify

- skullpatrol

good, what did you get?

- anonymous

i got 225 degrees.. which simplifys each cos and sin to -sqrt2/2 i believe

- skullpatrol

ok, substitute the value into the equation please :)

- anonymous

|dw:1433104713424:dw|
and then we'd times the whole thing by -2 to further simplify....correct...?

- skullpatrol

|dw:1433104740209:dw|

- skullpatrol

what happened to the variable "y"?

- anonymous

oh sorry i forgot it... lol

- anonymous

anyway.. id get the final equation
\[\sqrt{2}x+\sqrt{2}y+36 \]
right?

- skullpatrol

that^ is not an equation, it is an expression

- anonymous

=0 on the end

- skullpatrol

an equation has an equals sign, right?

- anonymous

hahaha so ive been told..

- skullpatrol

and the signs are not right :(

- anonymous

wait really? whys that

- skullpatrol

|dw:1433105082303:dw|

- anonymous

|dw:1433105127782:dw|
this is what i did

- skullpatrol

|dw:1433105213074:dw|

- anonymous

okay... besides from correcting ever single minor thing.. i believe i did this problem correct. thanks for your time

- skullpatrol

You're answer is right :)

- skullpatrol

thanks for trying to learn

- skullpatrol

I apologize for "correcting every single minor thing..."

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