Дано: х и z; угол 1+ угол 2=100 градусов. Найти: угол 3 ???

Пожалуйста помогите решить!!!;)

Как эти предложения будут в пассивном залоге?

I bought a house

i am buying a house

i have bought a house

i was buying a house

i had bought a house

i will buy a house

i will be buying a house

i will have been buying a house

Найти прозводную функци sin(x2-5x+1)+tg5/x