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Matematica - Elemente de trigonometrie. Elemente de geometrie plana

Elemente de trigonometrie. Elemente de geometrie plana - Intrebarea 2

Valoarea lui cos 75 to the power of ring operator este:

fraction numerator square root of 6 plus square root of 2 over denominator 4 end fraction
fraction numerator square root of 6 minus square root of 2 over denominator 4 end fraction
fraction numerator square root of 2 minus square root of 6 over denominator 4 end fraction
  Raspunsul este corect.
  Raspunsul este gresit.

Explicatie:

Răspuns corect: B

cos 75 to the power of ring operator equals cos left parenthesis 45 to the power of ring operator plus 30 to the power of ring operator right parenthesis