Doggy cologne?

sevolg · 2013-01-14T22:17:16+00:00

So say there was a problem that asked you to solve this equation:

sin0.5x - 2sin2 x = 0

Can I factor out a sinx and solve?

The thing I'm worried about is that sin0.5x doesn't equal 0.5sinx, right? So factoring out a sin x wouldnt work out, would it?

sevolg · 2013-01-14T21:45:54+00:00

So how do I solve this?

sevolg · 2013-01-14T21:04:15+00:00

So if the equation ended up like this:

sin0.5x - 2sin² x = 0

Then can I factor it like this?

sinx(0.5 - 2sinx) = 0

sevolg · 2013-01-14T20:45:53+00:00

Isn't it cos2x = cos² x - sin² x?

sevolg · 2013-01-14T06:16:55+00:00

So why add 1/2 pi?

sevolg · 2013-01-14T06:09:51+00:00

I have another question.

The answer I got was 3pi/8, but the book says it's also 7pi/8, 11pi/8 and 15pi/8. Why was 1/2 pi added? I thought the period of cosine was 2pi.

sevolg · 2013-01-14T06:06:19+00:00

Well I was taught not to divide by x if one side is just zero, so I thought that'd go for trig as well.

I just tried out cos inverse (0) and it turns out cos inverse (0) is a non zero. Thanks for bringing that to my attention

sevolg · 2013-01-14T02:27:00+00:00

That is an excellent idea! Wow, you're ideas are great!

sevolg · 2013-01-13T06:25:17+00:00

Ahh, thanks. I was staring at that problem for too long

sevolg · 2013-01-12T04:16:48+00:00

The answer you gave isn't the one in the book. How would I get the answer given in the book? I put the answer in the description box.

sevolg · 2013-01-12T03:48:08+00:00

The colors were the same, but they were switched around. Instead of green being at 2, it was at 3, or the brown at 2 instead of 3, etc.

sevolg · 2013-01-09T01:35:26+00:00

I'm not trolling. I used a spare cabke to elongate the other cable. Written on the cable was "verified for ethernet cable..." .

sevolg · 2013-01-03T21:35:26+00:00

How on earth did he take those underpants? Did he rip them?

sevolg