Odpowiedź:
Szczegółowe wyjaśnienie:
(cos65°-cos25°)/(sin65°-sin25°) = [cos(90°-25°)-cos(90°-65°)]/(sin65°-sin25°)=
= (sin25°-sin65°)/(sin65°-sin25°) = -(sin65°-sin25°)/(sin65°-sin25°) = -1
c.n.d.
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Odpowiedź:
Szczegółowe wyjaśnienie:
(cos65°-cos25°)/(sin65°-sin25°) = [cos(90°-25°)-cos(90°-65°)]/(sin65°-sin25°)=
= (sin25°-sin65°)/(sin65°-sin25°) = -(sin65°-sin25°)/(sin65°-sin25°) = -1
c.n.d.