What is half the vertical distance from the crest to the trough of a transvers wave?

Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.

Determine the maximum r-value of the polar equation r =3+3 cos 0

If y gets smaller as x gets bigger and y have an relationship?