For example, there are very few topics about trigonometric functions in the mathematics liberal arts of our college entrance examination this year 12.
Compared with the one-module, two-module and three-module papers, there are too few questions about trigonometric functions.
But now the trend of mathematics college entrance examination is to interweave trigonometric functions with other knowledge to give questions.
I still want to memorize the trigonometric formula. Just in case,
I hope I can help you. Take advice,