2. What was the primary reason that no major war erupted during the Cold War?

Explanation:

It was called the Cold War because there was no active war between the two nations, which was probably due to the fear of nuclear escalation. There were many indirect conflicts like the Vietnam and Korea wars. There was the Cuban missile crisis in 1962 which was the closest the world ever came to a nuclear war.

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

d) he bring down boss tweed and tammany hall.