The values of cos0 °, tan0 ° and sin0 ° are obtained

1,0,0

RELATED INFORMATIONS

1. Let a and B be square matrices of order n, and | a | is not equal to 0. It is proved that AB is similar to ba
2. Let a and B be invertible matrices of order n. how can we prove that the determinant of AB is equal to that of Ba?
3. A. B is a square matrix of order n, and the determinant of a is not zero. It is proved that AB is similar to ba Linear algebra problem
4. It is known that the eigenvalues of a matrix of order 3 are 2,1, - 1. Find the eigenvalues of a + 3E and calculate the determinant | a + 3E|
5. A is a real symmetric matrix of third order, a ^ 2 + 2A = 0, R (a) = 2. Find all eigenvalues of a and the value of determinant | a ^ 2 + 3E | Why R (a) = 2, then - 2 is a double root?
6. Let a and B be m * N and N * m matrices respectively. It is proved that AB and Ba have the same nonzero eigenvalues
7. Let all the elements of the fourth-order matrix a be 1, then the nonzero eigenvalue of a is 1
8. A is a nonzero matrix of order n. given a ^ 2 + a = 0, can we deduce that - 1 is an eigenvalue of a? Yes A^2+A=0 So f (x) = x ^ 2 + X is a zeroing polynomial of matrix A, The eigenvalue of a can only be the root of the zeroing polynomial f (x), that is, 0 or - 1, Because a is a nonzero matrix, it is impossible to have all zero eigenvalues, So there must be an eigenvalue - 1 A is a non-zero matrix, so when the eigenvalues are impossible, they are all zero? For example, a = [0 01; 0 00; 0 00]
9. It is proved that if a is a matrix of order s * n, then the eigenvalues of ATA are all nonnegative real numbers
10. Let a be a matrix of order n and satisfy AAT = e. the determinant of a is less than zero. It is proved that - 1 is an eigenvalue of A
11. Suppose that vector a + radical 3 vector B is perpendicular to 4 vector A-3 radical 3 vector B, 2 vector a + radical 3 vector B is perpendicular to vector a-radical 3 vector B, And the vectors a and B are not equal to 0, find the angle between a and B
12. Proof problem: known: as shown in the figure, in the quadrilateral ABCD, ab ‖ CD, ab = CD. Proof: ad = CB
13. The counterexample is () A. x=4B. x=3C. x=2D. x=15
14. If x and y are all real numbers, and a = xsquare - 2Y + 1, B = ysquare - 2x + 2, it is proved that at least one of a and B is greater than 0
15. Take e, F, G and h on AB, BC, CD and Da of space quadrilateral ABCD If it can intersect with EF and GH at a point P, what is the position of point P?
16. It is known that e, F, G and H are respectively the middle points of AB, BC, CD and DA on the four sides of the spatial quadrilateral ABCD It is known that e, F, G and H are respectively the middle points of AB, BC, CD and DA on the four sides of the space quadrilateral ABCD 1. If BD = 2, AC = 6, then eg & sup2; + HF & sup2= 2. If the angle between AC and BD is 30 °, AC = 6, BD = 4, calculate the area of efgh
17. It is known that the quadrilateral ABCD is a spatial quadrilateral, and e.f.g.h is a spatial quadrilateral AB.BC.CD . da What is the shape of a quadrilateral efgh 2 when AC = BD, the shape of efgh is 3 when AC ⊥ BD, the shape of the quadrilateral efgh is 4 when AC and BD satisfy, the quadrilateral efgh is a square
18. If PAB / PA = 1 / 2, PC / PD = 1 / 3, then the value of FBC / AD is? This is the answer to the 14 questions filled in the blanks in 2010 The right process Wrong number There's no F
19. A quadrilateral ABCD inscribed in a circle, CE ∥ BD intersecting the extension of AB in e AD.BE=BC .DC
20. In quadrilateral ABCD, ad ∥ BC, in order to judge whether quadrilateral ABCD is parallelogram, it should also satisfy () A.∠A+∠C=180° B.∠B+∠D=180° C.∠A+∠B=180° D.∠A+∠D=180°