In triangle ABC, if sin ACOS B Tan C is less than 0, then what triangle is it·

In triangle ABC, if sin ACOS B Tan C is less than 0, then what triangle is it·

sinA>0,∴cosB*sinC/COSC0.∴cosB/cosC

Put the nine numbers 3, 6, 9, 12, 15, 18, 21, 24 and 27 into a nine square respectively. The sum of the three numbers in each row, column and diagonal is equal to 45
How can we work out such a number? How
I'm tired of trying one by one... I want to know if there is a way to know it at once

If you know that three numbers add up to 45, you can list all the formulas, then look at the number of times a number appears, and choose the appropriate position to fill in the blanks. (1) 3 + 15 + 27 = 45 (2) 3 + 18 + 24 = 45 (3) 6 + 12 + 27 = 45 (4) 6 + 15 + 24 = 45 (5) 6 + 18 + 21 = 45 (6) 9 + 12 + 24 = 45 (7) 9 + 15 + 21 = 45

1 / 4,1 / 2,1,2,4,8,16,32,64 fill in the square so that the product of multiplication of all numbers on all rows, columns and diagonals is equal, and find the value of X

From left to right, the first line is 8,1 / 4,32, the second line is 16,4,1, and the third line is 1 / 2,64,2

There are numbers from 1 to 36 in a 6 × 6 square. How can we make them add up horizontally to 111, vertically to 111, and diagonally to 111?

28 4 3 31 35 10
36 18 21 24 11 1
7 23 12 17 22 30
8 13 26 19 16 29
5 20 15 14 25 32
27 33 34 6 2 9

Fill in any number from 1 to 36 in a six times six square so that the sum of horizontal, vertical and oblique is 111

17,35,19,10,24,6
8,26,1,28,33,15
30,3,14,5,34,25
12,21,32,23,7,16
13,4,18,36,11,29
31,22,27,9,2,20
Some of them are not aligned. Just write them in the grid. What's the problem, please

In the nine by nine grid, fill in the 81 numbers of 1 ~ 81, so that each row, each vertical and each diagonal is equal to 369

The first line: 47, 58, 69, 80, 1, 12, 23, 34, 45 the second line: 57, 68, 49, 9, 11, 22, 33, 44, 46 the third line: 67, 78, 8, 10, 21, 32, 43, 54, 56 The fourth line: 77, 7, 18, 20, 31, 42, 53, 55, 66 The fifth line: 6, 17, 19, 30, 41, 52, 63, 65, 76 the sixth line: 16, 27, 29, 40, 51, 62, 64, 75, 5 the seventh line: 26, 28, 39, 50, 61, 72, 74, 4, 15 the eighth line: 36,38,49,60,71,73,3,17,25 the ninth line: 37,48,59,70,81,2,13,24,

In the eight by eight grid, fill in the 64 numbers from 1 to 64 so that each row, each vertical line and each diagonal line is equal to 260

64 2 3 61 60 6 7 579 55 54 12 13 51 50 1617 47 46 20 21 43 2440 26 27 37 36 30 31 3332 34 35 29 28 38 39 2541 23 22 44 45 19 18 4849 15 52 53 11 10 568 58 59 5 4 62 63 1. Manual calculation can be used to calculate the dead

1. The numbers 2, 3, 4, 5, 6, 7, 8 and 9 in the 3 * 3 lattice make the numbers horizontal, vertical and oblique equal to 12

All equal to 12 is impossible. All equal to 15 is OK
\x09\x09\x09\x09\x09\x09\x09\x09
\x098\x093\x094\x09\x09\x096\x097\x092
\x091\x095\x099\x09\x09\x091\x095\x099
\x096\x097\x092\x09\x09\x098\x093\x094
\x09\x09\x09\x09\x09\x09\x09\x09
\x09\x09\x09\x09\x09\x09\x09\x09
\x094\x093\x098\x09\x09\x092\x097\x096
\x099\x095\x091\x09\x09\x099\x095\x091
\x092\x097\x096\x09\x09\x094\x093\x098

1. The numbers 2, 3, 4, 5, 6, 7, 8 and 9 in the 3 * 3 lattice make the numbers in horizontal, vertical and oblique directions equal to 15?

294
seven hundred and fifty-three
six hundred and eighteen

The numbers 1 to 8 are filled in 8 squares, so that the sum of 3 numbers on each line is equal to 14 (3 squares above and 2 squares in the middle)

1 5 8
2 6
3 4 7