Question

Value of sin(20) * sin (40) * sin (60) * sin(80) is ?

Answer 1

try changing all into 50

Answer 2

sin(50 - 30) * sin (50 - 10) * sin (50 + 10) * sin(50 + 30)
we might get in some standard angle form

Answer 3

hw to get rid of this??

Answer 4

sin(50 - 30) sin(50 + 30)

Answer 5

must get it:)

Answer 6

where do you get these stuff??

Answer 7

from my book

Answer 8

you got an awesome book

Answer 9

@yahoo u should purchase S.L.Loney's Plane Trigonometry book.

Answer 10

thanx @experimentX

Answer 11

@Yahoo! i will prefer u better to download S L Loney's Plane trigonometry book that is available for free on internet ...

Answer 12

sorry i am late to answer this question

Answer 13

ya good @mathslover

Answer 14

also why dont you a complete book of formulas for trigonometry ....

Answer 15

hmm.... thats more better

Answer 16

@mathslover give ur ans tooooo

Answer 17

do u need the link for that @Yahoo!

Answer 18

@Yahoo! IIT-JEE demands all good books

Answer 19

i think the answers are already given by @maheshmeghwal9 and @experimentX

Answer 20

if u want i am giving the solution wait

Answer 21

ok i am waiting!

Answer 22

If u wanna download books go to \[\color{red}{\text{{freebookspot.es}}}\]

Answer 23

on any category

Answer 24

if you upload that book (if it's legal and free) we all would be glad

Answer 25

It is free site @Yahoo! @experimentX @mathslover

Answer 26

I can't upload becoz my net has very slow speed.
Extremely sorry.

Answer 27

i am uploading wait

Answer 28

very much thanx @mathslover :)

Answer 29

@mathslover waiting

Answer 30

@Yahoo! i am first converting djvu file to .pdf so that u can open it ... it will take about more than 5 minutes...

u can do ur work i will reply and tag u if it gets uploaded

Answer 31

btw here is the answer of ur question @Yahoo!

Answer 32

hmm.... very short good @mathslover

Answer 33

guys pls discourage answering qns on maths in physics group .thank you

Answer 34

@AravindG maths and physics are linked!

Answer 35

k! I will follow u @AravindG .Thanx:)

Answer 36

@Yahoo! bt the openstudy etiquette is against this

Answer 37

oh...no i have nt read code of conduct sorry!!!!

Answer 38

:) ya ...u may even be reprted abuse by any user .why take chance when there is a math group
entirely for you in openstudy?

Answer 39

oh..no want will i do now??

Answer 40

its good that u closed the qn ..well in future try to post qns in their appropriate groups

Answer 41

ok...thxx for ur info

Answer 42

welcomesss

Answer 43

@AravindG u r a very responsible person.
Good to see that:-)

Answer 44

thanks @maheshmeghwal9

Answer 45

no thanx:)
u deserve my good comment:)

Answer 46

^_^