Question

If A =

2

{ : 9 0, 0} x x x   

B =

{ : 3} x x N 

Find i) A X B​

Answer 1

Step-by-step explanation:

find A.

4

L4x

(b) IfA=

find the value of a.

tanA

9 (a) Prove that

10. (a) If OA OB

1 - cos2A

sin2A

(b) If sing = { (m + in), find the value of sine.

(c) Prove that: cos20° cos40° cos80°

1 / 1

= 12, ZAOB = 60° and |OA| = 4 find (OB

(b) If OA = 7T + 37° and OB = 27° - T' and AC = CÊ” find oC.

(c) In a set of observation of data, the first quartile is 5 and third quartile is 75. Find the

quartile deviation and its coefficient.

Group C

[11 X 4 = 44

11. Solve: x - 4x2 – 7x + 10 = 0

12. The third and sixth terms of a geometric series are respectively 12 and 96. Find the

sequence.

309

Speedy Optional Maths - Book 10

8. (a) If two straight lines ax - y - 7 = 0 and 3y + x-9 = 0 are perpendicular to each other,

(b) Find the inverse of the point P(3, 5) with respect to the circle x2 + y = 4.