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amruta1997
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how to find value of sin 18.......plz explain in detail
 2 years ago
 2 years ago
amruta1997 Group Title
how to find value of sin 18.......plz explain in detail
 2 years ago
 2 years ago

This Question is Closed

Rezz5 Group TitleBest ResponseYou've already chosen the best response.0
without the use of the calculator?
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
how 2 derivate it
 2 years ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.0
taylor expansion can estimate it for you
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
i did not get what u want to say
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
sauravshakya u may try
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
who is taylor
 2 years ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.0
Taylor Expansion is the way of estimating and function sinx is \[x\frac{ x ^{3} }{ 6 }+\frac{ x ^{5} }{ 120 } ...+...\]
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
5*18=90 sin(5*18)=sin90 Let x=18 then, sin(5x)=sin90
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
i think u r wrog somewhere
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
U can proceed from here but this will be too long but it will give u exact value.
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
we dont have a formula for sin 5 thete
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
From sin(5x)=1 u need to find the value of sinx
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
i mean to say we dont have its expansion
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
sin(5x) = sin(2x + 3x) = sin2x * cos3x + cos2x * sin3x
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
hmmmmm that wd be 22 long
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
5x= 90 2x+3x=90 3x=902x sin 3x= cos 2x now put formula of sin 3x and cos 2x in terms of sin x only.
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
hmmmmmm this wd b an easy one
 2 years ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.0
18=Pi/10 sin(Pi/10)=0.3090169944 F[x]\[=x\frac{ x ^{3} }{ 6 }+\frac{ x ^{5} }{ 120 }... \] f[Pi/10]==0.3090170542 you decide
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
Great!
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
but when we will solve the quadrtic equation then we will get two values of sin theta
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
which one is great
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
@gohangoku58 's one
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
hmmmmmmm
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
because that gives exact value not approximate
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
hmmmmm but two values
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
which one to select
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
u plz try it once
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
well, sin 18 lies in first quadrant so take positive value
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
u'll get a cubic equation, with one root = 0 (can't be, rejected) and 2 other roots.....from which u select one with positive value..... like saura said...
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
i failed 2 use common sence
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
no not a cubic but a quadratic u try it
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
i tried it jjust now
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
sin 3x= ?
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
3sinx4 sin cube x
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
3sinx4 sin cube x<cubic
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
no but sin 2 x is also there
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
*cos 2x
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
12sin square x
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
then we can take sin in common
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
no u cant 1 is there
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
r u there on facebook
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
sorry for the personal Q
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
we both are there...
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
all of u
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.1
dw:1353245978780:dw
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
may i know ur id's
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
we can contact there also
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
saura i will tell u wait
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
what say saura ?
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
short form
 2 years ago

gohangoku58 Group TitleBest ResponseYou've already chosen the best response.1
4 x^3  2 x^2  3x + 1 = 0 one root is x=1 which can't be.... i made a typo earlier and wrote that one root is 0
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
one moment plzz
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
2 theta=903 theta
 2 years ago

amruta1997 Group TitleBest ResponseYou've already chosen the best response.0
sin 2 theta = cos 3 theta.................sin (90theta)=costheta
 2 years ago
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