Jamie228
01.12.2020 •
Mathematics
En une heure, un ouvrier peut effectuer les 3/25 d'un ouvrage, un deuxiemeouvrier les 5/36 , un troisième les 7/30. 1- Quelle partie de l'ouvrage pouraient-ils faire en travaillant ensemble pandent un heure ? 2- Quelle fraction de l'ouvrage resterait encore à effectuer ?
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Ответ:
15:17
Step-by-step explanation:
Since the triangle has a right angle, we may find the length of the unknown side using the trigonometric notations SOH CAH TOA where
SOA stands for
Sin Ф = opposite side/hypotenuses side
Cosine Ф = adjacent side/hypotenuses side
Tangent Ф = opposite side/adjacent side
With respect to ∠B given that ∠D=90°,
BD is the adjacent side
CB is the hypotenuse side
and DC is the opposite side
Hence Sin B = 15/17