Seja \( sen\alpha = 1/2 \) e \( sen\beta = 1 \), então \( sen(\alpha + \beta) \) é igual a:

Determine, em termos de \( a \) e \( b \), o valor de \( \log\left( x^2 - x + \dfrac{1}{x} - \dfrac{1}{x^2} \right) \), sendo \( a = \log\left( x - \dfrac{1}{x} \right) \) e \( b = \log\left( x + \dfrac{1}{x} - 1 \right) \).

A razão entre a soma e o produto das raízes da equação x² – 6x +8 = 0 é:

A figura a seguir representa o gráfico da função do 2º grau y = x² – 5x + 6. Determine x₁ e x₂, os valores de x para os quais y = 0.

What’s the passive voice of:

“The police officer is questioning the suspect and the witnesses.”

Complete the sentence with the correct modal verbs in the appropriate form respectively: “When I was 10 years old, I _____ bake cookies, but now I _____.”

Complete the sentence with the best relative pronouns respectively:

“Albert Sabin, ____ has never won a Nobel Prize, invented an oral vaccine ____ prevents the poliomyelitis.”

What’s the feminine and plural forms of:

man - son - husband - prince - hero

Complete the story below using the genitive case when necessary:

“Becky and Bella__ are sisters. They have two dogs and a cat. The girls__ bedroom is very big. The pets sleep in Becky__ and Bella__ bedroom. Becky__ and Bella__ beds are very comfortable.”

Choose the correct prepositions to fill these blanks respectively:

“Don’t argue _____ your father _____ that topic. You depend _____ him”.