jennielynn_1980
New member
- Joined
- Sep 5, 2008
- Messages
- 7
Hi everyone! I have three of these questions and I can't quite figure it out.
It says solve without your calculator:
a) sin (-5pi/4)
the answer in this case is the square root of 2 over 2. I have no idea how to get to this answer. The only thing I can think of is that at 45[sup:275pmsji]o[/sup:275pmsji] sin is = to pi over 4 and that has something to do with the answer. A hint in the right direction would be appreciated.
These are the other two questions.
b) cos(5pi/6)
c) tan(pi/3)
Thanks again
Jenn
It says solve without your calculator:
a) sin (-5pi/4)
the answer in this case is the square root of 2 over 2. I have no idea how to get to this answer. The only thing I can think of is that at 45[sup:275pmsji]o[/sup:275pmsji] sin is = to pi over 4 and that has something to do with the answer. A hint in the right direction would be appreciated.
These are the other two questions.
b) cos(5pi/6)
c) tan(pi/3)
Thanks again
Jenn