Pre Calculus
posted by Dylan .
ok I appologize for my stupidity...
I'll answer your question...
ok instructions to this problem
In problems 7788, use properties of the trigonmetric functions to find the exact value of each expression. Do not use a calculator
85. sin(pi/12)csc( (25 pi)/12 )
book dosen't say weather or not if it's in radians but I assume it is...
Ok I just put it into my calculator and got negative one I'm in radian mode...
Here's what I put in my calculator...
(sin(pi/12))/(sin((25pi)/12))
My back of the book, sense this is an odd problem gives me also 1 here's why...
when you added pi to the denomenator you forgot to make it negative...
this would give you negative one
ok
I have a question
why is sin(20)/cos 380
= to tan of 200
I know sin over cos is tan just don't see were the 200 came from thanks!

see...
( sin pi/12 + pi)/(sin (25 pi)/12 + pi)
this becomes
(sin pi/12 + pi)/(sin (25 pi)/12 + pi)
finish it off and you get negative one...
why is sin(20)/cos(380) equal to tan(200)
I don't understand