
preguntas matematicas
Authored by laura lopez
Mathematics
12th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Cuál es la altura de un árbol que proyecta una sombra de 20 metros formando un ángulo de 45 º?
14,14m
14m
20m
28,28m
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿ Cuál de las siguientes igualdades es incorrecta?
Cos (-a) = cos a
tg (180º + a) = -tg a
tg (90º . a) = cotg a
sen (180º + a) = -sen a
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Qué razón trigonométrica es positiva en el primer cuadrante?
coseno
seno
tangente
todas ellas
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿ A qué equivale el seno de un ángulo en un triángulo rectángulo?
hipotenusa
/ cateto contiguo
hipotenusa/ cateto opuesto
cateto opuesto/ hipotenusa
cateto contiguo/ cateto opuesto
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Indica cual es el resultado de (a-b)2
2a2-ab+2b2
-a2 . b2
a2 - b2
a2-2ab+b2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
resuelve la siguiente operación
(3x2+4x)+(6x2+2x)
9x2+6x
6x2+4x
x2+4x
10x2+4x
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Resuelve la siguiente operación
(x2−5x+4)−(−3x2+4x+2)
Resuelve la siguiente operación
−2x2−x+6
4x2−9x+2
−2x2−9x+6
−2x2−9x+2
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