alignamsmathhorizontal alignmentmath-mode
Is there a way possible to imitate the align environment for math mode commands, without having all writing being placed toward the center on the output page?
MWE:
\documentclass{article}
\usepackage{mathtools}
\begin{document}
\begin{align*}
\cos\theta_1 \cos\theta_2-\sin\theta_1\sin\theta_2 &= \cos(\theta_1 +\theta_2) \\
\sin\theta_1 \cos\theta_2 + \cos\theta_1 \sin\theta_2 &= \sin(\theta_1+\theta_2)
\end{align*}
\end{document}
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
m^+\cdot k^+ &= m^+\cdot k+m^+ &&\text{by M2}\\
&= m\cdot k+k+m^+ &&\text{since $k\in B$}\\
&= m\cdot k+(k+m^+) \\
&= m\cdot k+(k^{+}+m)&& \text{by the second result}\\
&= m\cdot k+m+k^+ &&\text{commutativity of addition}\\
&= m\cdot k^{+}+k^+
\end{align*}
\end{document}
Without specifying a package option to amsmath, you can use the flalign[*] environment and add some (unused) alignment characters & to typeset the equation flush right:
\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\begin{document}
\lipsum[1] \setlength{\abovedisplayskip}{0pt} \setlength{\abovedisplayshortskip}{0pt}
\begin{flalign*}
&&\sin 2x &= 2\sin x\cos x \\
&&\cos 2x &= \cos^2 x-\sin^2 x
\end{flalign*}
\lipsum[2]
\end{document}
The adjustment to the lengths \abovedisplayskip and \abovedisplayshortskip (both set to 0pt) was merely to reduce the gap above the flushed equation. This may not be necessary in the document in general.
Best Answer
The amsmath package has a
fleqnoption which, according to the manual (texdoc amsmath) has the following effect:Thus:
seems to be what you are after.
The
mathtoolspackage loadsamsmathinternally and passes any unknown arguments on to it. This includes thefleqnoption. Thus:also works.
Here's a comparison of the outputs. The upper one is without
fleqnand the lower one with.