- Number of coin of twenty five and fifty paisa are 100 and 20 respectively.
- 120 km.
Exercise 5⋅ 2
- c 2. b 3. b 4. c 5 d 6. b 7. a 8. (1) d (2) c (3) a
9. 2 , 3 10.
3
2 3
,
23 2
11. 1 , 6 12. r 7 13.
23
6 ,- 20
3
1 ,- , 2
2
1
16.
32
0 , 17. r ab 18. 0 , ab 19.
¿¾½
̄®
21
3 ,- ¿
¾½
̄® , 2
3221.{a,b} 22. { 1 , 1 } 23. { 1 } 24. { 0 , 2 a} 25.
¿
¾½
̄®
, 1
31- 78
or 8727 .Length 16 metre, breadth 12 metre 28. 9 cm., 12 cm. 29. 27
cm.
- 21 persons, Tk. 20 31. 70 32. a. 70 9 x, 9 x 7 b. 34 c. 5 cm. 5 2 cm.
- b. 5 cm.. c. 2 : 5 : 8
Exercise 9.1
- 3
4
,cos
74
,sec
37
,cot
73
,tan
47
cosA A A A ecA- 17
8
,cos
1715
sinA A- 12
5
,tan
1312
,cos
135
sinθ nθ θ- 2
1
23.
43
24.
34- 2 2
2 2
a ba b