Valeriagonta2003ask
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[tex] \cos( \frac{\pi}{2} - x) = \\ \\ \\ \cos(60) = \cos( \frac{\pi}{2} - \: \: \: ) = [/tex]
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Răspuns :

Răspuns:

Explicație pas cu pas:

cos(π/2-x)=sinx

cos 60=cosπ/3=cos(π/2-π/6=sin π/6

Targoviste44ask

[tex]\it cos(\dfrac{\pi}{2}-x)=sinx\\ \\ cos60^o=cos(\dfrac{\pi}{2}-\dfrac{\pi}{6})[/tex]

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