uproszczenie wyrażenia
: 27 lut 2014, o 22:23
czy można tak zrobić:
\(\displaystyle{ \left[\cos \left[ \frac{x-1}{2} \right] - \frac{1}{ \cos \left[ \frac{x-1}{2} \right] } \right] =\cos \left[ \frac{x-1}{2} \right] \left[ \cos \left[ \frac{x-1}{2} \right] -1 \right] = \cos ^{2} \left[ \frac{x-1}{2} \right] -1}\)
?
\(\displaystyle{ \left[\cos \left[ \frac{x-1}{2} \right] - \frac{1}{ \cos \left[ \frac{x-1}{2} \right] } \right] =\cos \left[ \frac{x-1}{2} \right] \left[ \cos \left[ \frac{x-1}{2} \right] -1 \right] = \cos ^{2} \left[ \frac{x-1}{2} \right] -1}\)
?