January 2019 1 32 Report
Oblicz wartość wyrażenia :
cos(- \frac{ \pi }{6} )*tg( \frac{5 \pi }{6})*sin(- \frac{ \pi }{3} )*ctg(- \frac{2 \pi }{3} )

Powinno wyjść -1/4 ( tak jest w odp.), a mi wychodzi 1/4 .
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