Sine ndi invesi ya sine, m'madigiri

Pa tirigonometri, yambani ndi kuona muyeso wa ngodya: D yaing'ono pa sikirini ikutanthauza madigiri. Dinani , lembani 30, , ndi . $\displaystyle \sin 30^{\circ}$ ndi $\displaystyle \dfrac{1}{2}$, yoonetsedwa ngati fulakishoni. Dinani kuti mupeze desimo: 0.5. $\displaystyle \sin^{-1}$ ndi cholembedwa cha chikasu pamwamba pa batani la sin. Dinani ndi , lembani 0.5, , ndi : madigiri 30.

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