January 2019 0 14 Report
Oblicz wartości pozostałych funkcji trygonometrycznych kąta x.
c) sinx =  \frac{1}{ \sqrt{3} } x ∈ ( \frac{ \pi }{2} ; \pi ))
d) sinx = -  \frac{ \sqrt{2} }{5} x ∈ ( \frac{3 \pi }{2} ; 2 \pi )
c) tgx =  \frac{ \sqrt{5} }{2} x ∈ (0 ; \frac{ \pi }{2} )

Udowodnij tożsamość trygonometryczną:
a)  \frac{1}{1+cosx} = \frac{1}{ sin^{2} x} - \frac{1}{sinx} ctgx
b) tgx + ctgx = \frac{1}{sinxcosx}
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