
Trigonometry Skills Assessment Quiz
Passage
•
English
•
10th Grade
•
Easy
LEILA AMARAL DA COSTA
Used 1+ times
FREE Resource
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
1
Answer explanation
O seno de 30° é conhecido como ½, que é igual a \frac{1}{2}. Portanto, a resposta correta é \frac{1}{2}.
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
0
Answer explanation
O cosseno de 60° é conhecido e é igual a \( \frac{1}{2} \). Portanto, a resposta correta é \( \frac{1}{2} \). As outras opções não correspondem ao valor do cosseno para esse ângulo.
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
0
1
Answer explanation
A tangente de 45° é igual a 1, pois em um triângulo retângulo isósceles, os catetos são iguais, resultando em uma razão de 1 entre o cateto oposto e o cateto adjacente.
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Qual das seguintes é uma identidade trigonométrica?
Answer explanation
A identidade trigonométrica correta é \(\sin^2 \theta + \cos^2 \theta = 1\), que é uma das relações fundamentais da trigonometria. As outras opções não são identidades válidas.
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Answer explanation
Para encontrar $\theta$, usamos a função inversa do seno: $\theta = \arcsin\left(\frac{3}{5}\right)$. Calculando, obtemos $\theta \approx 36.87^\circ$. Portanto, a resposta correta é $36.87^\circ$.
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
1
0
Answer explanation
O valor de \( \cos 90^\circ \) é 0, pois no círculo unitário, o ângulo de 90 graus corresponde ao ponto (0,1), onde a coordenada x, que representa o cosseno, é 0.
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Answer explanation
Para \(\tan \theta = \frac{1}{\sqrt{3}}\), sabemos que \(\tan 30^\circ = \frac{1}{\sqrt{3}}\). Portanto, \(\theta = 30^\circ\) é a resposta correta.
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