To improve the calculation ability of junior high school mathematics, we need to recite the trigonometric function values of square, cube and special angle of trigonometric function. The following are some necessary mathematical formulas:

1, square difference formula: a2-b2=(a+b)(a-b).

2. Complete square formula: a2+2ab+b2=(a+b)2.

3. Cubic summation formula: a3+b3=(a+b)(a2-ab+b2).

4. Cubic difference formula: a3-b3=(a-b)(a2+ab+b2).

5. Complete cubic summation formula: a3+3a2b+3ab2+b3=(a+b)3.

6. Complete cubic difference formula: a3-3a2b+3ab2-b3=(a-b)3.

7. Three complete square formulas: a2+b2+c2+2ab+2bc+2ac=(a+b+c)2.

8. Cubic summation formula: a3+b3+c3-3abc = (a+b+c) (a2+b2+c2-ab-bc-ac).