If we convert 135° to radian measure, we get
A.3π/4 B.3π/2 C.π/4 D.π/2 E.(3+π)/2
- 75° in radian measure is
A.π/75 B.75/π C.5π/12 D.12π/5 E.π/30
3.An arc PQ subtends an angle 60° at the centre O of radius 3 cm. The area of the sector POQ is
A. 270 〖cm〗^2 B. 3/2 〖cm〗^2 C. 3π/2 〖cm〗^2 D. 3π 〖cm〗^2 E. 180 〖cm〗^2
4.A sector of a circle has arc length of 8 cm and the area of 16 cm2,then the radius of the circle
in cm , is
A. 2 B. 3 C.5 D. 48 E. 12
- OAB is a sector of a circle with centre O, radius 8 cm
. Let S = {1,2,3,4,5,6,7,8,9} and A = { 1,2,3,4,5}, B = { 2,4,6,8}. Find (a) A^' (b) B^'
(c) A'∩B' (d) A∪B (e) (A∪B)^' what can you say about A'∩B' and (A∪B)^'?
- S = {1,2,3,4,5,6,7,8}, A = {1,2,3,5,7}, B = {1,3,5,7}, C = {2,4,6,8}
(i) List the sets A^', B^'and C^'.
(ii) State whether each of the following is true or false.
(a) A∩A^'=∅ (b) A∪A^'=∅ (c) A⊂B (d) B⊂A
(e) A'⊂B' (f) B'⊂A' (g) B^'=C (h) B⊂C^'
