help why isn't this correct

[foggy basin]

please can somebody help me?

<@&791435371564892232>

[rugged junco]

which one ?

[foggy basin]

im not sure it said its wrong

but idk which one is wrong

[rugged junco]

what did you do ?

[rugged junco]

heyyy check the inequality

below 360

[foggy basin]

oops

my phone is lagging

and all the messages are senidn glate

[foggy basin]

oh right

[rugged junco]

yes its fine

[foggy basin]

im so silly man

[rugged junco]

it happens mate dont worry

[foggy basin]

tyy

[rugged junco]

npp

[rugged junco]

hey its not how its done

[foggy basin]

yeh i just realised i was going to come back

aha

how do u do it aha

[rugged junco]

😂😭

good

do not replace the sin 2x .

[foggy basin]

with 2sinxcosx?

[rugged junco]

sin 2x will be equal to 2/3

[rugged junco]

yepp

do not replace

then key angle will be equal to sininverse(2/3)

find the angle

[foggy basin]

oh

olkay lemme try that again

[rugged junco]

and the quadrant

yes and since there is 2x (revolution) you should +360 wait i’ll try to do it

[foggy basin]

okay thank you

[rugged junco]

here

whenever there is sin(nx) where n is any integer , you should add 360 to it and then divide by n

i hope this working will help.

[foggy basin]

oh righttt i see tysmm 😭 wait so why couldnt i replace sin(2x) as 2sinxcosx?

[rugged junco]

you could use it only if it was equal to 0 for eg: cosxsinx =0 or tanxsin2x=0

like the LEFTHAND SIDE should be equal to the RightHAND SIDE

[foggy basin]

oh i see

i guess in year 1 i wouldnt usually change the double angle because i could do it but since ive got introduced to double angles i always feel the need to change it to a single one if you get what i mean

i need to stop confusing myself lol

thank you sm for the help i appreciate it!

[rugged junco]

did you understand this ?

[rugged junco]

double angles are mostly used when proving the identities then you use the proved ans to find theta

[foggy basin]

yess like the identities

when proving and show that qurstions

[foggy basin]

oh right that makes sense

[rugged junco]

you’ll get used to it eventually dont worry just continue to practice the past papers

[foggy basin]

I will tysmm

[rugged junco]

okay good take care and ace in your exams 🙏🏻❤️

[foggy basin]

tysmm 😭😭

I have 2 more question IF U DONT MIND IM SO SORRY

apparently yhat inequality one is wrong

[rugged junco]

quotient

rule

[foggy basin]

just that?

[rugged junco]

its a mcq right ?

[rugged junco]

for this one

[foggy basin]

I can do multiple answers but idk

I tried 4 and 5. It didn't work. but i could try 4 on its own

[rugged junco]

wait

which one are we talking ?😭

[foggy basin]

it wasn't right. i think there's more than 1 answer

lol the multiple choice one

atm

[rugged junco]

??

[rugged junco]

its the 3rd and 4th

my bad wait wait

[rugged junco]

b^2-4ac <0 . Then solve

[foggy basin]

okay ill try that in a bi

[foggy basin]

i did but it said i was wrong 😦

[marble hare]

That’s the right method

You probsbjust made an algebra mistake

[foggy basin]

so is my answer wrong?

[marble hare]

If it says it’s wrong probs

I haven’t looked

I’m not doing the mental maths rn

[foggy basin]

yeh it said i was wrong aha

haha okay

[rugged junco]

its only Quotient Rule…

[foggy basin]

it didn't work ☹️

[rugged junco]

i dont think other applications are applied to this one

[foggy basin]

oh

[rugged junco]

heyyy

its the chain rule too

[foggy basin]

so just the quotient and chain rule?

[rugged junco]

bc when you do quotient rule you should also use chain rule to differentiate

[rugged junco]

yess. if its not correct imma need to review the differentiation topic😭

[marble hare]

no it will be power rule too ?

[foggy basin]

lmao ill try them then

okay so I'll do power rule quotient and chain rule

[rugged junco]

look

[foggy basin]

or no

[rugged junco]

first differentiate the eqn and apply all the required rules

then you see whats in the box and you tick🙏🏻

[foggy basin]

I did chain and quotient rule and it didn't work

[marble hare]

It’s power as well

[foggy basin]

oh okay ill try that on another attempt! lmao 😭🤣

[rugged junco]

its gonn be the first and quotient one

[marble hare]

To differentiate anything it has to be power

[rugged junco]

sure answer

lol

[marble hare]

Yeah it’s not gonna be chain

[foggy basin]

After I've figured out this

oh

[marble hare]

it’s power and quotient

[rugged junco]

yep

[foggy basin]

so option 4 and 5?

[rugged junco]

my bad sorry🙏🏻

[marble hare]

Like to use the quotient rule you have to use the power rule

[marble hare]

No

[foggy basin]

oh

[rugged junco]

1st and quotient

[foggy basin]

ohh okay

[marble hare]

1 and 4

[foggy basin]

okay ill do that

[foggy basin]

i gotta redo this question before I can reattempt again