rubyhunter
find the sin(x+pi) in terms of x (HELP ME!!!!)



This Question is Open

jishan
Best Response
You've already chosen the best response.
0
 sinx

rubyhunter
Best Response
You've already chosen the best response.
1
what does that mean ?

rubyhunter
Best Response
You've already chosen the best response.
1
can you walk me through it

jishan
Best Response
You've already chosen the best response.
0
that means angle lies in 3rd quadrant.

rubyhunter
Best Response
You've already chosen the best response.
1
i still dnt get it how do i plug it in

rubyhunter
Best Response
You've already chosen the best response.
1
is it sin(x=180) = sinx

rubyhunter
Best Response
You've already chosen the best response.
1
or am i way off

jishan
Best Response
You've already chosen the best response.
0
in 3rd quadrant sin ,cos,sec,cosec ve but tan, cot +ve.

rubyhunter
Best Response
You've already chosen the best response.
1
IM FREAKING LOST

jayz657
Best Response
You've already chosen the best response.
0
using the trig identity
sin(a+b) = sin(a)cos(b) + cos(a)sin(b)
sin(x+pi) = sin(x)cos(pi)+ cos(x)sin(pi)
cos(pi) = 1
sin(pi) = 0
and you get
sin(x)(1) + cos(x)(0)
= sin(x)

Praja_01
Best Response
You've already chosen the best response.
0
sin(180+x)= sinx
since sin is symmetrically opposite.