trong không gian, cho hình chóp OABC có OA, OB, OC đôi 1 vuông góc và cùng độ dài a. Chứng minh rằng OA vuông góc BC

Asinusoidal function whose frequency is 1/6pi

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?