# Search results

1. ### Question about simplifying this equation

Thanks for telling me about the symbols. That should come in handy :) Just realized this isn't the forum for homework questions so I'm going to make a new thread in the correct section.
2. ### Question about simplifying this equation

I have another question I can't understand. Which expression is equivalent to cos(pi + theta) (I don't know how to import the signs. and I checked the computer's character map) So what I did was take cos(pi + theta) and put down the formula: cos pi * cos theta - sin pi * sin theta But I...
3. ### Question about simplifying this equation

Yeah, thanks for that. But I thought about what mathman said and the answer was obvious, lol. Thanks a lot though for working it out. Yeah, so the 2(1/cosx) becomes 2secx... That was pretty stupid, lol. Thanks though. This is a little off-topic for this thread but I really lack in courses...
4. ### Question about simplifying this equation

tan x/sin x + 1/cos x The choices are A. 2tan^2x B. 2cosx C. 2cosx-1 D. 2secx Do I make the tan sin/cos and multiply by reciprocal of sin? I did that and end up with 1/cos + 1/cos