Multiple choice test: solving the related formulas of triangle and double angle formula

In 2006, multiple-choice questions (1)+ fill-in-the-blank questions (1)1.

Multiple choice test: translation and expansion transformation of trigonometric function images

Fill-in-the-blank question: a brief comment (related formula of double-angle formula)

In 2007, multiple-choice questions (1)+ fill-in-the-blank questions (1) 13 or so.

Multiple choice test: trigonometric function of period

Fill-in-the-blank question: a brief comment (related formula of double-angle formula)

There is also a problem involving sine theorem.

Fill in the blanks in 2008 (1)+short answer (1) 5+ 14= 19

Fill in the blanks: trigonometric function period

Short answer test: brief comment (related formula of double angle formula)

Fill in the blanks (1)+short answer (1) 19 in 2009.

Fill-in-the-blank problem: Find the cycle by combining trigonometric function images.

Short answer test: combined with vector test, simplify evaluation (related formula of double angle formula)

20 10 fill in the blanks (track 2)+short answer (1 track) 25 points.

Fill in the blanks: the nature of trigonometric function and the flexible application of sine and cosine theorem

Short answer test: the test of finding the maximum value by combining mean inequality is to combine vector test with simplified evaluation (related formula of double angle formula)

To sum up, it can be seen that since the question type was changed in 2008, the triangle part consists of two spaces and a short answer question, accounting for about 20 points. 65438+ 0/8 of the total volume.

Fill-in-the-blank test of trigonometric function, image and period (the most common test)

Different from other provinces in China, the short answer is mainly about the formula of double angle and the related formula of sine and cosine theorem

Therefore, we should pay attention to it.