#MAT trig question

1 messages · Page 1 of 1 (latest)

rancid lagoon Mar 19, 2023, 5:33 PM

#

how would i go about simplifying this

#

saw a sin^2 + cos^2 hiding

#

so i did
1 + cos^2 x + 3sinxcosx = 0

#

3sinxcosx = 1.5sin(2x) as well

#

dont see how thats helpful tho

formal torrent Mar 19, 2023, 5:40 PM

#

Change everything to tan

#

@rancid lagoon

nova timber Mar 19, 2023, 5:40 PM

#

why

#

just factorise it

formal torrent Mar 19, 2023, 5:41 PM

#

Well that’s how I’m told to do it

nova timber Mar 19, 2023, 5:41 PM

#

(sinx+cosx)(sinx+2cosx)

formal torrent Mar 19, 2023, 5:41 PM

#

And how’d you do that

#

Like how would you solve it

rancid lagoon Mar 19, 2023, 5:41 PM

#

fuckkkkk

nova timber Mar 19, 2023, 5:41 PM

#

factorising quadratics

nova timber Mar 19, 2023, 5:41 PM

#

formal torrent Like how would you solve it

one of the brackets has to be 0

rancid lagoon Mar 19, 2023, 5:41 PM

#

didnt even realise it was a quadratic

#

im so tapped

formal torrent Mar 19, 2023, 5:42 PM

#

nova timber one of the brackets has to be 0

Is this some yr13 method

#

Cause never heard of it

nova timber Mar 19, 2023, 5:42 PM

#

no

#

its gcse

formal torrent Mar 19, 2023, 5:42 PM

#

😑

nova timber Mar 19, 2023, 5:42 PM

#

(2x+1)(x-2)=0

#

for example

formal torrent Mar 19, 2023, 5:42 PM

#

I was garbage at this in yr11

nova timber Mar 19, 2023, 5:42 PM

#

2x+1=0 or x-2=0

formal torrent Mar 19, 2023, 5:42 PM

#

So how many solutions did u get

rancid lagoon Mar 19, 2023, 5:43 PM

#

hold on

formal torrent Mar 19, 2023, 5:43 PM

#

nova timber 2x+1=0 or x-2=0

How do u do that with sin and cos together

nova timber Mar 19, 2023, 5:44 PM

#

formal torrent So how many solutions did u get

idk havent done it

#

just how you would do it

formal torrent Mar 19, 2023, 5:44 PM

#

I turned it into tan in less than 30 secs

#

Never mind

#

I get it

nova timber Mar 19, 2023, 5:44 PM

#

sinx=-cosx
sinx=-2cosx
tanx=-1
tanx=-2

formal torrent Mar 19, 2023, 5:44 PM

#

I never thought of that

#

How you so smart

#

@nova timber

nova timber Mar 19, 2023, 5:45 PM

#

uhh

#

i just saw it was a quadratic

#

and tried to factorise it

formal torrent Mar 19, 2023, 5:45 PM

#

I did too

nova timber Mar 19, 2023, 5:45 PM

#

and it worked

formal torrent Mar 19, 2023, 5:45 PM

#

I’ll tell my teacher this

#

She tells us to do it step by step

#

She thinks we stupid

rancid lagoon Mar 19, 2023, 5:46 PM

#

it is a mat q tho

formal torrent Mar 19, 2023, 5:46 PM

#

My way works, just slower…

#

But your just too smart

rancid lagoon Mar 19, 2023, 5:46 PM

#

sometimes shit looks complcated but all it takes is some gcse method like here

nova timber Mar 19, 2023, 5:46 PM

#

rancid lagoon sometimes shit looks complcated but all it takes is some gcse method like here

ye

formal torrent Mar 19, 2023, 5:46 PM

#

Tutor me

#

🙂

#

I think that answers the queshtion then

rancid lagoon Mar 19, 2023, 6:03 PM

#

sinxcosx = 0

#

would it be better to divide by cos

#

or turn into double angle