Question

hey guys i need hlep in trignometry
http://prntscr.com/43gt0l
@dan815 @johnweldon1993 @Destinymasha @nincompoop

Answer 1

@RyGuy @JohnathansWorld someone plzz help meeeeeee

Answer 2

instead of theta i assume x
so we have
(cosecx - cotx )^2 = (1/sinx - cosx/sinx) ^2
= (1-cosx)^2/ (sinx)^2
= (1-cosx)^2 / (1 - (cosx)^2)
= (1-cosx)^2 / ((1-cosx)*(1+cosx) )
= (1-cosx) / (1+cosx)

Answer 3

@matricked see when do we know when to u se hwich identity cuz there r many identites

Answer 4

u may guess by checking what u need to prove..

Answer 5

@matricke dbut it takes a lot of timeeeeeeeeeeeeee

Answer 6

trying to guessss

Answer 7

@matricked guessing takes a lot of timee...@matrikced are there any rules or hints for finding it...plzz tell mee

Answer 8

yup sometimes ...

Answer 9

@matricked so tell me in which situation ...sometimess

Answer 10

@matrick so give me hints when to use wat cuz u told sometimes there r hintsss

Answer 11

@matricked plzz replyyy

Answer 12

try to give one more problem then ..

Answer 13

@matricked but i jsut require hints...u told there r hints sometimes..so tell me plzzzzzzzzz

Answer 14

see cosecx has sinx in the denom as well as cotx has sinx in the denom so we proceed the way as done above..
and sinx term is squared so can be converted to cos x
using sin^2 x + cos^2 x = 1

Answer 15

no cud u give me osme mor ehints that wud be helpf ul for me budy @matricked

Answer 16

replyyy

Answer 17

@matricked plzz bro tell me more hints..when to use whta

Answer 18

plzz give me more hints like when to use..what....plzz beg u

Answer 19

as told earlier it depends what u need to prove..
a little practice will help u master that..

Answer 20

@matricked kk fine but just give me somemore exampless.cuz i have test plzz sir plzz

Answer 21

see when u get stuck u may seek help

Answer 22

plzz gimme some more example plzz..or else i will fail today..beh uuuuuuuuu

Answer 23

u may choose any arbitray question and then i may help you in understanding the steps

Answer 24

no gimee few examples..clues plzzzz

Answer 25

@matricked plzz sirrr

Answer 26

i don't have the questions with me ready..

Answer 27

no but sir just give me some relation between identitiess

Answer 28

pick up one from your text books

Answer 29

kk thnxx sir..for spending ur val tame wid me...

Answer 30

by d way i really appreciate your way of understanding the problems..

Answer 31

kk thnxx sir...u rockk

Answer 32

lets
take
we need to prove
cos x /(1+sinx ) = (1-sinx) / cosx

Answer 33

kk

Answer 34

here as in the RHS you have (1-sinx ) which can not be factored out from the LHS
so here in this problem we need to multiply (numerator and denominator) by (1-sinx)

Answer 35

can you try this..

Answer 36

thnxx sir..i will//i got,,it...thnk u
gtg
byeee

Answer 37

i kno how to solve it....ime to go for test'

Answer 38

cos x /(1+sinx )
= cos x (1-sinx ) / ( (1+sinx )* (1-sinx ) )
= cos x (1-sinx ) /( 1 sin^2 x)
= cos x (1-sinx ) / cos^2 x
= (1-sinx) / cosx (one of the cos x from num and denom cancels out )

Answer 39

ok bye
best of luck dear..