1:53 AM
The older version of this answer seemed pretty good. I don't understand the edit... I also don't understand the addition of a second answer from the same user.

1 hour later…
2:54 AM
-10

Pr A Find all solutions of the equation $\sin\theta=\cos\theta$. Pr B Solve the equation $\sin\theta=\sqrt{3}\cos\theta$ for $0\le \theta <2\pi$. Pr C Solve the equation $\sin 2\theta=\cos\theta$ for $0\le \theta <2\pi$. Pr 1 Solve the equation $2\sin^2 \theta - \sin \theta =0$ for \$0\le \theta

That has to be one of the laziest posts I've ever seen on this site.
Couldn't even be bothered to finish writing the title.

4 hours later…
6:40 AM

3 hours later…
9:57 AM
D1, D2, D3.
D4, D5, D6.
D7, D8, D9.
@XanderHenderson It think it was a quote but that user didn't bother to fix the line-breaks in the copy-pasta.

D5 looks like a standard lemma that it can't hurt to have here

It also looks like a homework problem posted by a lazy person who can't even bother to try anything.

but in the long run, it's just a question with a useful answer

I know your view, but sorry I'm not a fan of being accommodating to laziness.

the OP already got their free lunch; at this point deleting won't help anyone

10:03 AM
It would discourage the free lunch fountain from flowing.

not so much... the sort of people who post homework exercises aren't the sort of people who even look at existing threads

I'm talking about the users who post free lunches. The deletion will make them think twice about repeating their 'generosity'.

gardening the archives isn't going to raise their post quality

And the askers also are penalized by the deletion. Both penalties apply as long as it is a recent enough question.