A

1. N :) 137 = 43, ) 95 = 85, ) 100 = 80.

2. N :) 150, ) 103, ) 175.

3. N : = 2 23 + 32 + 148 157, = 78 + 121 + 59 + 102, = 55 + 135 125.

4. N : ) 2135+ 150 = 1, ) 2120 2150= .

5. 0 x < 90, :) 2x 3 = 0, ) 2x 1 = 0, ) x 1 = 0, .

6. 0 x < 90, :) 5x + 4 = 0, ) 8x 3 = 0, ) 5x 8 = 0.

7. 0 x 180, :) 5x + 2 = 0, ) 3x 1 = 0, ) 6x 21 = 0.

8. 90 < x 180, :) 10x + 3 = 0, ) 8x 7 = 0, ) 10x + 6 = 0.

9. 90 < x 180, :) 42x + 3 = 0, ) 22x 1 = 0, ) 2x 3 = 0.

10. ,

: = ,

= .

11. : (90 ) (180 ) + (90 ) (180 ) = 0.

(180 ) (90 ) (180 ) (90 )

(180 ) (90 ) (180 ) (90 ) (180 )

112

T334

M ;

329-336 12-07-07 03:49 334

karidiTypewritten Text . . .

12. . .

13. 8 cm , = 3 cm. , .

14. 0 x 90, (3x 2)2 = 4.

15. :) (27 ) = (153+ ), ) (45 ) (135+ ) = 0.

16. 0 x 90, x (x + 30) = (2x + 15).

17. 0 x 180, x = x.

18. 0 x 180, 42x + 2x = 0.

19. 0 x 180, 32x + 2x 1 = 0.

20. 0 x 180, 22x 3x 2 = 0.

21. : ) (90+ ) = , ) (90+ ) = .

335

329-336 12-07-07 03:49 335

: 1. , 2. , 3. , 4. , 5. .

1. .

2. ) 150 = , 150 = , 150 = ,

) 103 = 77 0,974, 103 = 77 0,225, 103 = 77 4,331,) 175 = 5 0,087, 175 = 5 0,996, 175 = 5 0,087.

3. = 23 0,391, = 0, = 0.4. .5. ) x = 60, ) x = 60, ) x = 45.6. ) x 53, ) x 68, ) x 58.7. ) x 114, ) x 19 x 161, ) x 74.8. ) x 107, ) x 119, ) x 149.9. ) , ) x = 135, ) x = 120.

10. = , = .

11. .12. .

=

=

= 180

= 180

.13. , = 1 cm, = 4 3 cm, = 7 cm,

=

= ,

= ,

= ,

= 43

= 43.

14. x = () x = 0, x = 90.

15. .16. (x + 30) = (2x + 15) (90 x 30) = (2x + 15) 90 x 30 = 2x + 15,

x = 15.17. x = 135.

18. 42x + 2x = 0 2x (2x + 1) = 0, x = 0 x = , x = 90 x = 120.

19. x, x = , x = 1 x = , x = 180

x 71.

20. x, x = , x = 2 () x = ().

21. ) (90 + ) = (90 ) = , ) (90 + ) = (90 ) = .

12

3 + 54

13

2 + 46

12

43

17

17

437

23

33

32

12

T336

329-336 12-07-07 03:49 336