1, give a complex trigonometric function expression, and ask for its minimum positive period. This problem requires a deep understanding of trigonometric function knowledge in high school mathematics and an accurate understanding of various symbols and languages in the topic.

2. Given the images of the two functions, the examinee can judge whether they intersect. This question requires candidates to systematically and comprehensively use the knowledge of function concept, image analysis and judgment in high school mathematics, and have keen reading comprehension ability for various details in the topic.